Term
Describe the three layers that make up the wall of the eyeball. |
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Definition
The external layer, formed by the sclera and cornea
The intermediate layer, divided into two parts: anterior (iris and ciliary body) and posterior (choroid)
The internal layer, or the sensory part of the eye, the retina |
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Term
Describe visible light. What is the range of wavelengths that a typical human eye can see? |
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Definition
Visible light is the light that humans can see. Humans Can see Visible Light. |
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Term
Describe the lacrimal gland and its function. |
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Definition
In charge of cleansing, moisturizing the eye, as well as serving as an antibacterial |
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Term
Describe the conjunctiva and its function. |
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Definition
The conjunctiva is a transparent mucous membrane that covers the sclera |
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Term
Describe aqueous humor and its function. |
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Definition
| A water like fluid produced by the ciliary body. |
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Term
Describe the cornea and its function. |
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Definition
The cornea is the clear bulging surface in front of the eye,
it’s the main refractive surface of the eye. |
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Term
| 7. Describe the three chambers of the eyeball |
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Definition
| anterior chamber, the space between the cornea and the irisposterior chamber, the space between the posterior surface of the iris and the anterior surface of the lens.vitreous chamber (or cavity), the space between the posterior surface of lens and the retina |
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Term
| 8. Describe the retina and its function. |
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Definition
| The retina is a light-sensitive layer at the back of the eye that covers about 65 percent of its interior surface. |
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Term
| 9. Describe the iris and its function. |
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Definition
| The iris is the colored contractile membrane of the eye, It separates the anterior and posterior chambers of the eyeball |
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Term
| 10. Describe the sclera and its function. |
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Definition
| It protects the eye from diseases and helps keep our eye healthy. |
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Term
| 11. Describe the lens and its function. |
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Definition
| To reflect the light and then you see that the black and white sclera protecs the iris with the cornea and with the macula on the helping optic nerve. |
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Term
| 12. Describe the optic nerve and its function. |
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Definition
| Transmits information from your eye to your brain |
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Term
| 13. Name the four kinds of light-sensitive receptors found in the retina. |
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Definition
| Rods, Long, Middle, And Short WavelenghtC Cones. |
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Term
| Describe how the lens causes light to come to focus. |
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Definition
| It Magnifies the light that comes into your eye, eg balances the light |
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Term
| 14. Describe the zonules, also known as the zonules of Zinn, and its function. |
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Definition
| rings of tiny fibrous strands inside the eyeball which connect the lens to a surrounding ring of muscular tissue |
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Term
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Definition
Farsightedness.
P.S.Brian has this |
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Term
| 16. What is a cataract and what is the cause? |
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Definition
| Cataracts are cloudy areas in the lens inside the eye |
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Term
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Definition
| A Vision condition that causes blurred vision due either to the irregular shape of the cornea |
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Term
| 18. Describe the macula and the fovea centralis and their functions. |
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Definition
| The center of the macula is called the fovea centralis, an area where all of the photoreceptors are cones; there are no rods in the fovea |
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Term
| 19. What causes color blindness? |
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Definition
| A Person can't see red, green or blue and all of them mixed. |
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Term
| 20. Name four symptoms associated with dry eyes. |
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Definition
1. Itching
2. Burning
3. Foreign body sensation
4. Redness |
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Term
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Definition
| The blind spot is the location on the retina known as the optic disk where the optic nerve fiber exit the back of the eye. Because there are no cones or rods at this point on the retina, there is a very small gap in the visual field. |
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