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optician training Manual chapter 1

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what is the purpose of the cornea?

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Terms in this set (14)

what is the purpose of the cornea?

The cornea is a transparent surface on the exterior of the eye. t protects the eye from the outside world. Being transparent, it allows light to be transmitted through it and into the eye.

what is the purpose of the optic nerve?

Transmits sensory information to the brain

what are the two conditions that must be met in order for an image for form

focus and capture

formula for focal length?

two types of lenses with 3 separate powers?

trifocal and progressive

what part of the eye is capable of flexing to bring an image into focus

ghosting is a common symptom of what refractive error?

if a person complains of blurriness while looking at the television but sees well when reading, the most likely diagnosis would be?

what power lens (+or-) does someone who is hyperoptic require?

what is -4.00+1.00×090 in Minis cylinder form?

how much worse is 20/100 then 20/20

do glasses ever magnify?

formula to convert plus to minus cylinder, or vice versa?

c+s=s, change (+/-)=c, +/-90

what power lens (+or-) does someone who is myoptic require? (shortsighted/nearsighted)

-