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14 Cards in this Set
- Front
- Back
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What are the three layers of the eye? State their functions. |
1. Sclera - outer layer of the eye, tough, thick, resists puncture (for protection.) 2. Choroid - middle layer of tissue that contains blood vessels, also darkens the eye. 3. Retina - contains photoreceptors, rods & cones. Also converts light into nerve impulses. |
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What is the function of the aqueous humour? (2) |
supplies the cornea with nutrients and refracts light. |
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What is the function of the cornea? (1) |
refracts the light toward the pupil. |
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What is the function of the lens? (1) |
focuses the image on the retina. |
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What is the function of the pupil? (1) |
the opening (hole) in the iris that allows light into the eye. |
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What is the function of the iris? (1) |
regulates the amount of light entering the eye. (contains muscles that allow the pupil to become larger or smaller) |
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What is the function of the ciliary muscle? (1) |
accommodation reflex (contracts or relaxes to see at multiple distances.) |
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What is the function of the retina? (3) |
contains photoreceptors, rods and cones. (rods: used for dim light & cones: used for identifying colour.) |
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What is the function of the fovea centralis? (2) |
contains only cones & is the most light-sensitive area of the retina. |
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What is the function of the optic nerve? (1) |
transfer visual information from the retina to the brain (via nerve impulses) |
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What is the function of the blind spot? (1) |
it is where the optic nerve attaches to the retina (no rods or cones) |
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Identify 4 differences between rods and cones. |
1. Rods are located in the periphery, whereas Cones are located in the central. 2. There are a lot more rods than cones in the eye. 3. Rods detect movement, whereas Cones identify colour. 4. Rods are used for night vision/dim light, whereas Cones are used for bright/daylight. |
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QUIZ ANSWERS: Left side from top to bottom. |
1. Optic Nerve 2. Blind Spot 3. Fovea Centralis 4. Retina 5. Choroid Layer 6. Sclera OBFRCS (Order Bacon From Restaurants Cause So good) |
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QUIZ ANSWERS: Right side from top to bottom. |
1. Cilliary Muscle 2. Lens 3. Aqueous Humour 4. Cornea 5. Pupil 6. Iris CLACPI (Can Lucy Appreciate Carla's Peanut Ingredients) |
