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Optical Indexes and Tendencies
Optical Terms Lecture Fall 2022
18
Other
Not Applicable
09/30/2022

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Term
Exophoria
Definition
A tendency of the eye to turn outward
Term
Esophoria
Definition
The tendency of the eye to turn inward
Term
Emmetropia
Definition
Normal eye, or no refractive error
Term
Hypophoria
Definition
The tendency of one eye to turn downward
Term
Isometropia (ISO means Equal)
Definition
Both eyes being alike in their refraction (Same RX)
Term
Phoria
Definition
A tendency to
Term
Hypotropia
Definition
One visual axis being below the other
Term
Antimetropia
Definition
Where one eye is hyperopic, the other is myopic
Term
Hyperphoria
Definition
Elevation of one visual axis over the other
Term
Esotropia
Definition
A definite and apparent turning inward
Term
Hypertropia
Definition
The tendency of one eye to turn upward
Term
Anisometropia
Definition
Unequal refraction of the two eyes
Term
Exotropia
Definition
A definite and apparent turning outward
Term
Tropia
Definition
An actuality
Term
Eso
Definition
Turning inward
Term
Exo
Definition
Turning outward
Term
Hypo
Definition
Turning downward
Term
Hyper
Definition
Turning upward
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