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6 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Refraction |
The bending of light as it passes from one medium to another |
Three structures that refract light: cornea, lens, and vitreous humor |
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Accommodation |
The ability of the eye to focus on objects by changing the shape of the lens |
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Emmetropia |
Normal vision |
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Myopia |
Nearsightedness
Occurs when eye is too long, so light is focused in front of the retina
Lens can't get flat enough, so the cornea refracts light and it scatters before it hits the retina |
Corrected with a concave lens |
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Hyperopia |
Eye is too short- farsightedness Light is focused behind the retina Lens isn't round enough |
Convex lens causes light to converge before it hits the eye |
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Presbyopia |
Loss of elasticity of the lens, commonly associated with old age |
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