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13 terms

Human Eye

STUDY
PLAY
Cornea
Transparent tissue covering iris + pupil.
Provides physical barrier protecting inside of eye.
Refracts about 2/3 of light.
Pupil
Opening that allows light to pass through.
More light = smaller pupil and vice versa.
Iris
Coloured part of eye.
Circle of muscle that regulates size of pupil.
Sclera
White of the eye.
Provide place for eye muscles to attach to.
Lens
Convex, refracts light + focuses it on back of retina.
Retina
Membrane lining inside of eye.
Contains photo receptor cells rods and cones.
Change light to electrical signals.
Optic Nerve
Pathway that light rays take from retina to optical lobe.
Aqueous Humour
Fluid found in front part of eye between iris and cornea. Provides nourishment, responsible for maintaining eye pressure.
Vitreous Humour
Clear gel that fills central core of eye.
Helps maintain spherical shape.
Path of Light
Cornea - Aqueous Humour- Lens - Vitreous Humour - Retina - Optic Nerve - Brain (optical lobe).
Blind Spot
Area of retina with no photo receptor cells.
Rods
Responsible for black + white vision, helps us see shapes.
Cones
Allow us to detect colour. Three different types (red, blue, green).