Certified Paraoptometric (CPO) - Unit III Study Guide
Visual Acuity (VA) CORRECT ANSWER-The meausure of the finest detail the eye can detect. Typically described as a Snellen fraction. Snellen Letters CORRECT ANSWER-Letters most often used to measure acuity at distance. Snellen Fraction (20/20) CORRECT ANSWER-= Testing Distance / Distance at which letter is standardized to be read Snellen numerator CORRECT ANSWER-Testing distance (usually 20 feet) Snellen denominator CORRECT ANSWER-Distance at which the letter is supposed to be read. Cover/Uncover/Alternative-Cover Testing CORRECT ANSWER-Examines the binocular relationship of the eyes. The patient is asked to fixate on a distant object (or near) while their eyes are observed. Exotropia CORRECT ANSWER-One eye fixating while the other deviates outward. Esotropia CORRECT ANSWER-One eye fixating while the other deviates inward. Hypertropia CORRECT ANSWER-One eye fixating while the other deviates upward.
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