| Term 
 | Definition 
 
        | An infection of gland in the eye. |  | 
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        | Term 
 | Definition 
 
        | The outer, white layer of the eye. |  | 
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        | Term 
 | Definition 
 
        | The muscles responsible for moving the eye within the orbital socket. |  | 
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        | Term 
 | Definition 
 
        | A circular clear area, in the very front center of the sclerotic coat. |  | 
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        | Term 
 | Definition 
 
        | The middle layer of the eye. |  | 
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        | Term 
 | Definition 
 
        | The choroid coat has a circular opening in the front. |  | 
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        | Term 
 | Definition 
 
        | A colored, muscular layer surrounding the pupil. |  | 
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        | Term 
 | Definition 
 
        | Help the iris to control amounts of light entering the pupil. |  | 
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        | Term 
 | Definition 
 
        | A crystalline structure located behind the iris and pupil. |  | 
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        | Term 
 | Definition 
 
        | How the lens is held place behind the pupil. |  | 
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        | Term 
 | Definition 
 
        | The innermost, or third coat of the eye. |  | 
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        | Term 
 | Definition 
 
        | A pale disc to the side of the fovea. |  | 
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        | Term 
 | Definition 
 
        | A condition of excessive intraocular pressure resulting in the destruction of the retina and atrophy of the optic nerve. |  | 
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        | Term 
 | Definition 
 
        | Constrict the pupil and thus increase the outflow of aqueous humor. |  | 
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        | Term 
 | Definition 
 
        | The vitreous fluid contracts as it ages and pulls on the retina, causing a tear. |  | 
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        | Term 
 | Definition 
 
        | The leading cause of blindness in American adults. |  | 
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        | Term 
 | Definition 
 
        | Burning, tightness, sharp or dull pain, watery, blurry vision, and headaches. |  | 
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        | Term 
 | Definition 
 
        | Comes from staring at a book, or the computer screen and forgetting to blink. |  | 
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        | Term 
 | Definition 
 
        | A condition that makes it difficult to see at night. |  | 
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        | Term 
 | Definition 
 
        | The inability to distinguish colors. |  | 
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        | Term 
 | Definition 
 
        | A condition in which the lenses lose their elasticity resulting in a decrease in ability to focus on close objects. |  | 
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        | Term 
 | Definition 
 
        | A condition in which the focal point is beyond the retina because the eyeball is shorter than normal. |  | 
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        | Term 
 | Definition 
 
        | A condition in which the focal point is in front of the retina, because the eyeball is shorter than normal. |  | 
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        | Term 
 | Definition 
 
        | A reduction, or dimness, of vision. |  | 
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        | Term 
 | Definition 
 
        | A condition in which there is an irregular curvature of the cornea or lens, which causes blurred vision and possible eyestrain. |  | 
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