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12 Cards in this Set
- Front
- Back
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Refraction |
In direction of a wave when it changes. Passes from one medium to another |
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Accommodation |
The ability to keep image fixed on retina "vocal point" with change in distance of the object |
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Thicker lens |
Benda light more |
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Emmetropia |
Normal visual activity |
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Myopia |
Nearsighted. Cannot see distant objects with persisian you can see near objects *Lens to thick *eyeball can be to long Fix- Concave lens Not getting to retina |
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Hyperopia |
Farsighted trouble seeing objects close up *Lens is to thin *eyeball to short Fix= convex lens. So your eye doesn't have to bend so much. |
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Presbyopia |
Similar to hyperopia but this one is due to age. *flat lens due to age loss of elasticity |
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Astigmatism |
Abnormal curvature of cornea the refraction of light rays in the horizontal plane is different from the vertical plane |
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Photo receptors |
Rods- peripheral and low light Cones- color acuity ( 3 types= blue, red green) |
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Color blindness |
X linked recessive trate *most popular colorblindness green/red and most popular in men because of their xy traits |
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Conduction deafness |
Any defect that prevents sound from reaching and vibrating basilar membrane (inside organ of cortli) via the normal pathway. |
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Nerve deafness |
Sound waves are reaching the basilar membrane but that action potential are not reaching the auditory cortex No AP on cranial nerve |
