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19 Cards in this Set
- Front
- Back
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What does the cornea do? |
Refracts light - bends it as it enters the eye |
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What does the iris do? |
Controls how much light enters the pupil |
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What do the lens do? |
Focuses light onto the retina |
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What does the retina do? |
Contains the light receptors |
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What does the optic nerve do? |
Carries impulses between the eye and the brain |
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What state are the radial muscles in when they are in dim light? |
Contracted |
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What state are the circular muscles in when they are in dim light? |
Relaxed |
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What state is the pupil in when the eye is in dim light? |
Dilated |
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What state are the circular muscles in when they are in bright light? |
Contracted |
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What state are the radial muscles in when they are in bright light? |
Relaxed |
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What state is the pupil in when the eye is in bright light? |
Contracted |
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When focusing on near objects, what state are the suspensory ligaments in? |
Slackened |
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When focusing on near objects, what state are the ciliary muscles in? |
Contracted |
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Is there a high or low muscle tension on the lens when focusing on near objects? |
Low |
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What shape is the lens while focusing on near objects? |
Fat |
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When focusing on distant objects, what state are the suspensory ligaments in? |
Stretched |
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When focusing on distant objects, what state are the ciliary muscles in? |
Relaxed |
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Is there a high or low muscle tension on the lens when focusing on distant objects? |
High |
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What shape is the lens while focusing on distant objects? |
Thin |
