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Terms in this set (431)
How is refractive anisometropia best corrected?
Accommodation reserve is the difference between?
supply and demand
A visual condition where the eyes make repetitive, uncontrolled movements often resulting in reduced vision is known as?
which of the rectus muscles is innervated by the cranial nerve VI?
excessive eyelid skin, commonly caused by aging is known as?
what is aphakia?
the absence of a crystalline lens
hyperopia is closely connected with which one of the following?
what is primary function of the inferior rectus muscle?
turn the eye downward
the tertiary action of the superior oblique is?
which rectus muscle is the strongest and is responsible for adduction of the eyeball?
divergence occurs when light rays?
bend away from the midline
what is the distance between two lines of focus called?
interval of sturm
the _________ is the area of the retina that is responsible for fine discriminations and high visual acuity?
tears spilling onto the cheeks is called?
which of the following is not a treatment method for aphakia?
the fixation monitoring method that periodically presents targets in the physiological blind spot is called?
which of the following is one of the major functions of the ciliary body?
the total amount of checks and cash in the money drawer should equal the total payments received as shown on the _____?
daily control sheets
convex lenses are also referred to as______?
what is the most prevalent type of cataract?
what is aqueous humor?
provides nutrients for the lens and posterior cornea
the system for sorting and assigning priorities for medical treatment based on the urgency of the systems is called?
a tumor that a patient may describe as a "scab that will not heal" would most likely be a ?
squamous cell carcinoma
the number of diopters of power is equal to the reciprocal of the focal length of a lens in?
the vascular tunic, or uvea, consists (from front to back) of?
iris, ciliary body, and choroid
the tertiary action of superior oblique is?
in the visual pathway, if a lesion occurs at the chiasm, the resultant visual field defects are usually?
because of its design, an arc perimeter is?
unable to test the central visual field
flexible lenses consist primary of ___________ and ________ materials?
an area within the visual field with absent vision or depressed sensitivity is?
the most common instrument used for measuring the base curve of a rigid contact lens is the?
a penetrating keratoplasty is also called?
yellowish fatty deposits that occur on the upper and lower eye lids, usually on the medial side are called?
extorsion is described as rotating the top of the eyeball _____ and the bottom ____________.
lenses that contain 70% more water are _______?
high water content lenses
which of the following would not be considered an emergency situation requiring immediate attention?
loss of a contact lens
the innervation of the cornea is mainly sensory branches of which nerve?
cranial nerve V (trigeminal)
what type of lens is used for correction of compound astigmatism?
the ability of the crystalline lens to focus is known as?
amplitude of accommodation
campimetry would be performed on which one of the following?
a tangent screen
what instrument is used in the clinical measurement of aniseikonia?
what is the distinction between hyperopia and presbyopia?
a 3.00 D lens has a focal length of?
the eye is said to have a refractive error when?
light rays do not bend properly to form a single point focus on the retina
any interruption in the innervation to Mueller's muscle results in which one of the following?
which extraocular muscles are involved when the patient's gaze is far left and up?
left superior and right inferior oblique
what is the name given to the area of the retina responsible for seeing detail?
the floor of the orbit is composed of which three bones?
maxilla, zygomatic, and palatine
the bulbar conjunctiva covers which one of the following?
a normal reduction in the ability to accommodate is known as?
myopia is commonly called?
when the eye lid turns in toward the globe, the condition is called?
which rectus muscle's primary action is depression of the eyeball?
what does O.D. stand for?
what is the distance of the lens to the front of the eye?
money owed to the practice is called?
the tendency of the eyes to turn in is referred to as?
what is a small, red portion of the corner of the eye that contains modified sebaceous and sweat glands?
which of the following is detected using the unilateral cover test?
a phoria or a tropia
the most common form of glaucoma is?
primary open angle glaucoma
which of the following would not be considered an appropriate telephone technique?
letting the phone ring several times before answering to give the impression that your office is busy
changing the test distance from 1m to 2m on a tangent screen will result in which one of the following?
a larger area of visual field being tested
a technique used to break visual skill plateaus is?
the abaptive mechanism seen most often as an attempt by the visual system to eliminate diplopia and confusing is known as?
the retinal surgery procedure that is most likely to cause the patient to become more myopic is?
what are radially arranged natural fibers in the eye that suspend the crystalline lens from the ciliary body and hold it in position?
where is redness usually concentrated in uveitis?
near the limbus
which of the following is the most common of all color vision defects?
what is the length of the eyeball from the cornea to the posterior pole known as?
during the alternating cover test, if the eye moves out to pick up fixation after it is uncovered, the eye is ____________?
under the post operative global period, what will determine when the patient begins their care under a co-managing doctor?
the date the surgeon has recorded in the patient's record for relinquishing care to the co-managing doctor
when a patient has difficulty bringing his or her eyes in and experiences blurred vision, diplopia, and eyestrain at near work, it is a condition known as?
recent studies have concluded that the relative risk of ulcerative keratitis with extended wear of disposable lenses is 4.5-7.0 times more likely than with?
conventional extended wear
what may ocular drugs not be used for?
paralyze the patient
the breaking finding indicates which one of the following?
amount of fusional vergence
light rays entering the eye must first pass through the?
to "break" a glaucoma attack, the doctor would use which one of the following?
which structure contributes approximately 70% of the optical power of the eye?
what is the post-op period for closure of punctum, by plug?
a spherocylindrical lens has maximum power in one major meridian and a minimum power in the meridian _________ degree away.
how long should the tear film remain uniform over the cornea after a normal blink (tear break-up time)?
the follow up visit for most foreign body removals should be scheduled at?
____________ is probably the most important test of all, especially in long term polymethylmethacrylate (PMMA) wearers, who in many cases have suffered from many years of low-level corneal anoxia, or oxygen deprivation?
slit lamp examination with lenses off
which of the following ocular conditions is not considered a "true" emergency?
amblyopia caused by uncorrected refractive error is known as?
which of the following would be an eye emergency that includes cells and flare in the anterior chamber but an intact cornea?
which of the following is not an example of a cycloplegic drug?
correcting one eye for distance and one eye for near is called?
what is the normal reading for the Schirmer tear test?
15-20 mm in 5 minutes
what is the speed of light in the air?
186,000 miles per second
treatment for a superficial corneal abrasion usually includes which one of the following?
cyclopleging the eye
which of the following is not a part of the ocular adnexa?
low vision patients are defined as having which one of the following?
20/400 or worse best corrected vision
the ratio of the speed of light in air to the speed of light in another medium is called the?
index of refraction
light rays assume a virtually parallel course, or "optical infinity", at approximately?
can you balance bill a patient for contractual obligations?
what are surgically implanted plastic half rings that change the shape of the cornea?
how many times per year can perimetry be performed on a Medicare patient with uncontrolled glaucoma?
varies among Medicare carriers; most commonly 4 times per year
what do you call a doctor, within your practice that has not signed a contract with an insurance company?
a non-participating provider
the index of refraction 1.523 is for which of the following media?
ophthalmic crown glass
cones in the human retina provide which of the following?
treatment for allergic conjunctivitis includes which one of the following?
a light ray traveling from one medium to another medium that has a higher index of refraction will be?
bent toward from the normal
accommodation is defined as?
the act of the crystalline lens at varying distances
on a patient fitted with gas rigid gas-permeable lenses needing a final prescription of -4.00 D and considering the lacrimal tear layer, what would the final contact lens power be? the trial contact lens prescription = -3.00 over refracted = -1.00 K's, 45.00, contact lens base curve 45.50 = +0.50?
what usually brings the patient with a foreign body into the office?
the average palpebral fissure measures?
documenting the patient's symptoms, including onset, frequency, and duration, is known as the ?
the normal visible iris diameter (VID) is?
which part of the eye is bioconvex, normally transparent, and fits just behind the iris?
is the advance beneficiary notice of non converage (ABN) used to notify patients that Medicare may not pay for a service?
patients with large pupils and flatter corneas, are usually fit?
with a larger overall diameter lens
the area of the retina that provides the most acute vision is the?
which condition are the following symptoms associated with: epiphoria, foreign body sensation, burning and sometimes itching?
the axis of the keratometer readings is set when?
locating the primary meridian measurement
the primary meridian refers to which one of the following?
the horizontal measurement of the cornea
the best electric hand held tonometer that is portable is the?
a tonometer that will release a puff of air on the cornea after the patient is instructed to look at the red dot in the instrument and everything is properly aligned and focused is?
the probe of the _________tonometer must be covered with a Ocufilm tip cover to prevent patient infection and cross contamination?
another term for keratometry is?
a tonometer that needs to be used with corneal anesthetic and fluroescein is?
the instrument used to determine the length of the eye ball in order to calculate properly the power of the intraocular lens to be implanted after cataract removal is?
an example of indentation tonometry is?
keratometry is the measurement of ?
which of the following ophthalm,ic instruments would be used to evaluate a cataract?
what is a laser based, non contact, technique that is capable of obtaining high resolution retina images?
Optical Coherence Tomography (OCT)
when replacing a slit lamp bulb?
use a tissue to hold the new bulb
a retinoscope would most likely be used to?
evaluate the refractive error of a non-responsive patient
the first step in focusing the eyepiece of the lensometer is?
turn it counterclockwise
if the tono-pen XL display "CAL" you should?
check the calibration
which of the following tonometers use an ocufilm tip cover?
which of the following tonometers use anesthesia and fluorescein intraocular pressure readings?
goldmann application tonometer
if the slit lamp does not move smoothly, the following procedure should be taken?
wipe the glide plate with a cloth that has been sprayed with WD-40
the eyepiece should not be rocked back and forth, as this could cause the user to?
what is the first step in evaluation of the slit lamp with no light?
check the connections
which of the following methods are most commonly used for cleaning the application tonometer between patients?
soaking the tip in 3% hydrogen proxide
cash paid out can be recorded in?
a cash disbursement book
treatment for an ophthalmic migraine includes?
amsler grid testing is normally used when which one of the following is present?
visual acuity is abnormal
which of the following is the first treatment step in the majority of infant dacryocystitis?
massage and antibiotic drops
allergic conjunctivitis is commonly characterized by?
inflammation of the conjunctiva
use of an ultrasonic instrument that gently breaks up the cataract into tiny fragments that can be suctioned out of the capsular bag is called?
a condition that exists when there is reduced visual acuity not correctable by refractive means and not attributable to obvious structural or pathologic anomalies of the eye is known as?
accommodation in the eye is linked with which one of the following?
an abnormality in which one or both eyelids droop is known as?
the critical factor in proper measurement of both near and distance visual acuity measurements is?
the difference between total ocular astigmatism and corneal astigmatism is called?
surfactant cleaners for soft and rigid contact lenses contain soaps and detergents to help remove which one of the following?
oil, make up, and lipids
metamorphopsia (often found in low vision patients) is meausred with which one of the following?
the amsler grid
the best portable charts measuring patients with low vision are the Feinbloom acuity chart and the?
the leading cause of legal blindness for people over the age of 65 in the united states is?
when both of the lens surfaces are plus and converge light to one focal point, it is a __________ lens?
the normal blink per minutes is?
if in doubt as to weather a patient requires an emergency appointment, the paraoptometric should?
consult with the doctor
who is credited with inventing bifocals?
the thinnest bone of the orbit is the _______________________________ bone?
benzalkonium chloride is a perservative used in ophthalmic mediciations, at what percent is it normally used?
the refraction of a patient with a probable prescription of stronger than +20.00 will probably best done using the?
trial frame and lenses
AREDs refers to?
a study sponsored by the national eye institute
according to HIPAA, how must a patient request their medical records?
signing a records release
in mixed astigmatism, the focal lines are?
located one in front of the retina and one behind the retina
patients who suffer from seasonal allergies may be difficult to fit because?
they take antihistamines
the expected AC/A ratio is?
the test distance for visual field testing with the tangent screen, is performed with which of the following units of measure?
a condition present when an eye fixates on a retinal area other than the fovea and present under monocular conditions is known as?
a ___________ lens will make objects appear smaller?
an extremely high intraocular pressure is indicative of?
angle closure glaucoma
a _______ lens will make objects appear larger?
what is the name given to the angle the temple makes with the frame front when the bottom of the eye wire is closer to the cheeks than the top is to the eyebrow?
how long should you wait until you attempt to repeat the procedure for taking a patient's blood pressure?
at least 60 seconds
patients presenting with symptoms including flashes of light should be seen?
symptoms of episcleritis include?
management of a patient with symptoms of flashes and floaters must include?
dilated fundus examination
when using the telephone collection procedure, the paraoptometric should?
be friendly, but firm
the best time to discuss payment policies with a patient is?
before the patient leaves the office
what condition is the most common cause of red eyes?
the condition in which the eyes are so tightly closed they cannot be opened is called?
combining front and back surface powers, the total power of the cornea averages approximately?
the ________ system is responsible for the production, maintenance, and elimination of the tear film?
the blood supply to the eye comes through which one of the following?
the anterior chamber and posterior chamber in front of the lens are filled with _________ humor?
a blepharoplasty may be performed to?
repair an eyelid that is drooping
when performing visual field testing, the blind spot?
should be mapped first
axial length discrepancies will result in producing a(n) ?
sport vision therapy is recommended for?
anyone interested in improving their visual skills
what should be used when a patient requests that his or her vision records be forwarded to another optometrist?
patient referral form
the key to success with the low vision patient is a goal stated by which of the following?
"i want to read to my granddaughter again"
if the office is extremely behind schedule, the paraoptometric should?
indicate your best estimate of how long it will be before the patient will be seen
the index of refraction is abbreviated by the symbol?
a patient should be considered a questionable credit risk when?
he or she refuses to give employment information
when a patient first walks into the office for an appointment, the paraoptometric should?
acknowledge the patient with a courteous greeting
how often should the paraoptometric check business supplies?
once a month
when discussing medical record documentation, EHR stand for?
Electronic Health Records
which of the following would be considered appropriate behavior in front of patient?
using soft tones while speaking to other staff members
the paraoptometric should maintain how much of a reserve of examination room supplies?
1 months worth
when recording bank statements, the canceled checks should be arranged by?
a caller who insists on a price estimate over the phone should be ?
told that the prices are estimated
minus lenses may cause?
extra care must be exercised when ordering drugs and solutions because most of them will?
have an expiration date
a low vision patient with Parkinson's disease would best be prescribed a ?
when performing visual field testing, the room illumination?
has an effect on the results of the visual fields test
the basic premise of vision therapy is that?
the eyes "feed" the brain
color vision is evaluated with the low vision patient to determine which one of the following?
an optic nerve disorder or retinal disorder
the tumor that typically has a raised surfaces with "pearly" edges is?
basal cell carcinoma
one of the most commonly used techniques in vision therapy and sports training is?
the brock string
what is the area of the contact lens that corrects the patients vision?
optical zone diameter
if a 1 foot target at 20 feet is enlarged through optics to 4 feet at the same distance, it has been magnified by a factor of?
the blood supply to eye comes through which one of the following?
the most important factor in the case history taken with a potential contact lens patient is?
why she or he is interested in contact lenses
when making appointments, the paraoptometric should not?
rely on memory
which of the following information does not need to be included on a payroll check stub?
number of dependents
what is the collection of instruments that run a computer called?
patients who show ________ or more of corneal astigmatism as demonstrated by keratoplasty are good candidates for a special posterior lens design called toric?
which muscles is responsible for eye lid closure and its controlled by the facial nerve (cranial nerve VII)?
the ability of the eye to locate, identify, and remember what we see referred to as?
which structure is the second most powerful refracting component of the eye?
what movement does the superior rectus muscle perform?
it moves the top portion of the eye upward
what movement does the inferior rectus muscle perform?
it moves the bottom portion of the eye downward
what movement does the medial rectus muscle perform?
it moves the eye inward towards the nose
what movement does the lateral rectus muscle perform?
it moves the eye outward near the temple
what are the two oblique muscles?
superior and inferior
what movement does the superior oblique muscle perform?
it moves the eye downward but rotates the eye front to back.
what movement does the inferior oblique muscle perform?
it moves the eye upward but rotates the eye outward
pupillary distance rule (PPD)
stereo fly test
farnsworth D-15 dichotomous test
Optical Coherence Tomography
farnsworth hue 100
Contrast sensitivity. Used to measure the patients perception of the difference between the compared stimuli
Straight cutting plier. Used to cut down long screws
Sphygmomanometer. Used with a stethoscope to determine a persons blood pressure
Goldman applanation Tonometer. Used to measure the pressure in the eye (intraocular pressure)
Needlenose pliers. Used to adjust notepads in tightly spaced areas
Maddox rods. Used to quantify eye misalignment
Retinoscope. Used to measure the refractive power of the eye
convex lenses are also called?
there is no refraction of light at?
the optical center
the eye is said to have a refraction error when?
light rays do not bend properly to form a single point of focus on the retina
which extra ocular muscles are involved when the patient's gaze is far left and up?
left superior rectus and right inferior oblique
a lens in which the center is thinner than its edges is known as?
the tendency of the eye to turn in is referred to as?
multifocal lenses that are used to correct three working distances are called?
a pseudophakic patients has had?
when attempting to dispense the thinnest lens possible, which of the following will reduce the bulge and magnification of plus lenses?
what is the cylinder axis tolerance for a lens with a cylinder power of -1.00 D?
+/- 3 degrees
what is the next step to take when recording vision on a patient who can not see the 20/400 E?
walk the patient closer to the chart til he or she can see the E
what is characterized by painful, vesicular skin eruptions?
what drug category would most likely be used to treat ocular inflammation?
axial length discrepancies will result in producing?
the near correction in the multifocal lens is usually calculated for working distance of ______ inches?
a cycloplegic drug may be used prior to the refraction on what case?
a pediatric exam
light rays assume a virtually parallel course, or 'optical infinity' at approximately?
a technique used to break visual skill plateaus?
a condition that exists when there is reduced visual acuity not correctable by refractive means and not attributable to obvious structural or pathological anomalies of the eye is known as?
when recording test distances for visual field testing with the tangent screen, the paraoptometric uses what unit of measurement?
when checking the calibration of a goldmann application tonometer, what settings should be evaluated?
if a patient calls requesting information that will take a few minutes to locate, the paraoptometeric should?
ask the patient if he or she would like to hold or ask to call the patient back
the most common form of treatment for diabetic retinopathy is?
when looking through a prism, objects will appear to be displaced toward the ______ of the prism?
ophthalmic prescriptions written by _____ will usually be in minus form?
there can be no more than ____ prism diopters of unwanted horizontal prism in a lens?
there can be no more than ____ prism diopters of unwanted vertical prism in a lens?
light rays passing through a prism will always be bent toward the _____ of the prism?
the ND: Yag Laser would most likely be used to treat a?
a purchasing notebook for frames should include all of the following except?
name of patient who have purchased the frame
the retinal surgery procedure that is most likely to cause the patient to become more myopic?
the tendency of the eye to turn in is referred to as what?
wtih conjunctivitis, where does redness usually appear?
in the fornies
extortion is described as rotating the top of the eye ball _____ and the bottom _____?
the difference in the size of the two retinal images?
the ability to see or appreciate depth using both eyes?
when verifying lens optical quality, the primary defect to search for is a localized area of?
tears spilling into the cheeks is called?
what is the condition of unequal refractive state of two eyes known as?
the highest degree of fusion is?
which term related to an actual deviation of an eye?
light waves produce vision in humans by stimulating the?
rods and cones
a microkeratome is used for?
create a corneal flap in LASIK
a right tropia is evident when?
the right eye moves when the left eye is covered
poly carbonate material filters out ____ of ultraviolet rays?
the vertical segment location tolerance for a mounted lens is within _____ mm of specification?
which absorptive glass tinted lenses are used as "blue blockers"?
a corneal dendritic figure is associated with?
a recession and resection surgery is done for?
when views at a specific distance, the letters of each line on a standard visual acuity subtends at an angle of?
5 minutes of arc
what is the normal reading for the schirmer tear test?
15-20 in 5 minutes
the average amplitude of accommodation at any age may be calculated using which one of the following equations?
18.5-1/3 age in years
the hard design progressive addition multifocal lenses are recommended for _____ patients?
what is the diopter power of a lens whose focal length is 800 mm?
what condition is associated with "cells and flare" ?
what is the best example of documentation of an eye glass prescription on a lab order form?
-1.00 -1.25 x 010
a boundary of the visual field in which a target of given value is visible is?
when the eyelid turns in toward the globe, the condition is called?
when ordering a trifocal lens, the intermediate segment will be made _____ of the near add power, unless stated otherwise?
at what distance should the examiner be positioned from the patient when taking their interpupillary distance measurement?
for a progressive addition lens to work properly, the minimum fitting height should be ?
know before taking the measurement, as each manufacturer may have different fitting heights
a raised, whitish, triangular shaped wedge of fibrovascular tissue on the conjunctiva?
what is the distance between two lines of focus?
interval of sturm
standard ophthalmic plastic lenses are made from a material called?
which of the rectus muscles is innervated by cranial nerve VI?
what is the minimum thickness allowed in the average industrial safety lens?
sports vision therapy is recommended for?
anyone interested in improving their visual skills
strabismic amblyopia, or "lazy eye" is most likely the result of what?
what is the small depression in the center of the macula lutea, which is located at the back of the retina?
how is the power wheel scale graduated for power between -3.00 and +3.00?
1/8 D step
the area of the retina that provides the most acute vision?
one of the most important procedures in any eye exam is?
taking a case history
which of the rectus muscles primary action is depression of the eyeball?
the excimer laser is used to?
campimetry would be performed on?
a tangent screen
a _____ is used to measure the surface power base curve of a lens?
a ____ lens will makes object appear larger?
which rectus muscle is the strongest and is responsible for adduction of the eyeball?
if a phone call is for a staff member who is busy with a patient, the paraoptometric should?
ask to take a message
on orders that include prism, both the amount of the prism and the prism ____ direction should be specified?
the purpose of evaluating the near point of accommodation is?
to check the ability of the eyes to focus at near
treatment for superficial corneal abrasion usually includes?
cyclopleging of the eye
while a paraoptometric is taking visual acuities, a patient is able to read all of the 20/25 line and only 2 letters on the 20/20 line. how could this be best recorded?
treatment for hyperopia is usually with which type of lens?
the thinnest bone of the orbit?
a _____ lens is used to correct a combination of myopia and hyperopia with astigmatism?
which type of light does a photochromic lens absorb?
what was the first bifocal style?
the practice of keeping medical records out of view of patients is compliant with?
the best portable chart measuring patients with low vision are the Feinbloom acuity and the?
bailey lovie chart
the bone behind the ear that the temple should be adjusted is the>
the suffix that usually indicates that a drug is an anesthetic is?
in the boxing system, the ____ dimension is the largest vertical dimension measured between the two horizontal tangents to the bevel tips?
the instrument that uses a hand held condensing lens to give a 3D, inverted view of the retina?
what is compromised when the surface of a glass lens is scratched?
a ____ lens has one surface that is flat, one surface that is plus, and it convergences to one single point?
when patients have functional visual problems, the first treatment of choice will be?
the best electronic hand held tonometer that is portable?
tono pen tonometer
______ absorptive glass tinted lenses reduce the intensity of all transmitted wavelengths evenly allowing colors to be seen naturally?
when the patient presents which symptoms including pain, photophobia, and lacrimation, what may usually be concluded?
the cornea is involved
a normal reduction in the ability to accommodate?
least structured method of taking history?
the poloarized lens is designed to eliminate glare reflected from ____ surfaces?
color vision is usually evaluated at what distance?
an extremely rare congenital color defect is?
the AOA set of principles that include the statement, "to keep patients' eye, vision, and general health paramount at all times" is called?
code of ethics
when an employee is added to the staff, what form must be filled out?
which lens material can produce the thinnest, most distortion free lenses?
high index plastic
when measuring a lens, if both sets of lines, making up the target sharply focus at the same time, the lens is a ____ power lens?
what is the first procedure in lensometry?
focus the eye piece
symptoms of flashes and floaters are generally associated with?
posterior vitreous detachment
the base curve of a spherocylinder lens is the ___ surface curve?
what is not a type of astigmatism?
a foreign body injury has symptoms similar to which one of the following?
a corneal injury
a colmascope is used to verify that a glass lens has been?
plastic lenses transmit ____ light ____ glass?
slightly more; than
the instrument used to determine the length of the eye ball in order to calculate properly the power of the intraocular lens to be implanted after cataract removal?
the treatment to enhance visual efficiency?
known as visual therapy
which of the following would not be considered and emergency situation requiring immediate attention?
loss of a contact lens
when both of the lens surfaces are a plus and converge light to one focal point, it is a ___ lens?
treatment once a foreign body has been removed?
a mucopurulent discharge usually accompanies what?
what type of glass is used in the manufacture of ophthalmic lenses?
a pseudophakic patient has has?
polycarbonate lenses do not need _____ coating, since their surfaces already have this properly.
there are approximately 130 million of _____ in the human retina?
most lenses used in ophthalmic prescriptions are ___ lenses?
if a base curve is specified when a lens is ordered, it should be supplied with ___ D?
a tonometer that will release a puff of air on the cornea after the patient is instructed to look at the red dot in the instrument and everything is properly aligned and focused?
in the snellen notation of 20/40, what does the number 40 represent?
the distance at which a letter subtends a 5 minute angle
which of the following lenses would be the best spherical equivalent substitute for a broken lens with a prescription of -4.25 -1.50 x 180?
when dispensing to children it is best to recommend what?
a phone message should include all except?
length of the call
a mydriatic drop affects the?
which of the following symptoms constitute a true eye emergency?
loss of vision
how is the interpupillary distance commonly abbreviated?
which of the following cylinder powers would be acceptable, according to ANSI standards, for a lens with a prescription of +3.00 -1.75 x 100?
how are light rays refracted in hyperopia?
behind the retina
when viewing front the side of the frame, with the bottom of the pads angling toward the frame front, you are evaluating the?
if a patients PD distance is 72 and the frame PD is 68, how much and in what direction will the laboratory need to decenter each lens in order to match the optical centers to the patients interpupillary distance?
2 mm out
the index of refraction for polycarbonate lens is?
the paraoptometric may use ____ for glare testing?
when a meibomian gland becomes blocked and red, a painful bump appears on the lid?
the abbe value of trivex is?
patients presenting with symptoms of flashes of light should be seen?
if a patient complains to itching, difficulty breathing, irregular heartbeat or extreme headache following administration of a ophthalmic drug you should?
immediately notify the doctor
the amount of prism in a lens is measured using the lensometer _______?
in an emmetropic eye, where are the parallel light rays refracted?
on the retina
the ratio of the speed of light in the air to the speed of light in another medium is called the?
index of refraction
one of the most important care tips for spectacles is that?
commercial cleaners should not be used if they contain alcohol
which test is commonly used to evaluate pursuits?
broad h test
if you are uncomfortable handling an emergency case over the phone?
consult with your doctor or another staff member
cover test are used to evaluate what?
the alignment of the eyes
the effective period of Atropine is?
up to 2 weeks
the last step in the standard alignment is?
fold the frame to see if the temples fold evenly across the front
anti reflective coating increases the light transmission of a clear lens from ____ % to approximately _____ %
patients with large pupils and flatter corneas are usually fit?
with a larger overall diameter lens
during chemical tempering of glass lenses for impact resistance, the lense are left in a hot chemical bath for ____ hours?
which is a major category?
pursuits are eye movements of what kind?
as they follow a moving target