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20 Cards in this Set
- Front
- Back
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What is considered legally blind?
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if he or she has a BCVA that does not exceed 20/200 in his or her better eye or of they hacae a visual field diameter og 20 degrees or less.
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What is amblyopia?
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a type blindness that may occur if strabismus is not corrected by 4-6 years old.
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aqueous humor?
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found in the anterior segment of the eye. fluid that is secreted by the ciliary body and reabsorbed by the sclera.
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Astigmatism?
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An abnormal curvature of the cornea that distorts the visual image. Light rays are spread over a diffuse area rather than a sharp;y focused on the retina.
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Ataxia?
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failure of muscle coordination and may be present in people with vestibular disease.
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Sensory perception?
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the translation and organization of sensations from the environment into meaningful information.
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Stimulas?
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An act or an agent that stimulates a receptor.
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Receptor?
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Specialized nerve cell that is stimulated by a stimulas.
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What is kinesthetic stimuli?
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provide an awareness of the position and movements of a person's body parts.
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Visceral stimuli
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are stimuli produced by large organs within the body.
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Does the sclera and cornea belong in the inner eye, outer or middle?
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Outer layer.
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What part of the eye is the iris , choroid, and ciliary body?
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middle layer.
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Myopia?
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nearsightness- unable to see road signs at a distance.
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hyperopia?
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farsightedness-unable to read objects close up!
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Name the 2 photoreceptors?
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rods & cones
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Which photoreceptor functions in night vision.
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rods
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Which photoreceptor functions in bright light & color vision?
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cones
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Which photoreceptor functions for visual acuity?
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cones
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The anterior cavity of the eye contains jelly-like substance called what?
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Aquaous humor
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The posterior cavity of the eye contains jelly-like substance called what?
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Vitreous humor.
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