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10 Cards in this Set
- Front
- Back
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Aberration
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Deviation from a single focus of light rays emanating from one source.
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Accommodation
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The ability of the eye to adjust focus for varying distances.
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Achromatic
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Descriptive of a lens capable of refracting light without creating a rainbow effect
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Acuity
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Visual expression of sharpness of vision (20/20 distance, J.1 near).
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Addition
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Difference in plus power between the reading and distance portions of a multifocal lens.
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Amblyopia
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Loss of vision without any apparent disease of the eye.
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Ametropia
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A refractive error in which the eye, when in a state of rest, does not focus the image of an object upon the retina; includes hyperopia, myopia, and astigmatism.
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Aniseikonia
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A condition in which the image of an object as seen by one eye differs so much in size or shape from that seen by the other eye that the two images cannot be fused into a single impression.
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Anisometropia
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A condition in which the refractive error of one eye significantly differs from that of the other.
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Anterior Chamber
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Front cavity or compartment of the eye, located between the cornea and crystalline lens. Contains the aqueous humor.
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