Illinois Vision Certification Practice Test

What term describes an observable deviation where the eyes tend to turn from their normal position?

1. Fusion

2. Phoria

3. Strabismus

4. Tropia

The correct answer is: Phoria

The term that describes an observable deviation where the eyes tend to turn from their normal position is strabismus. Strabismus refers to a condition where the eyes are not aligned in the same direction and may turn inward, outward, upward, or downward. This misalignment is easily observed and can result in issues such as double vision or problems with depth perception. Phoria, on the other hand, refers to a latent deviation that is not always manifest but can occur when both eyes are not focusing properly, particularly when one eye is occluded. It does not necessarily produce an observable deviation at all times, making it distinct from the visible misalignment characteristic of strabismus. Understanding these terms is crucial in the field of vision care and helps in diagnosing and treating various eye conditions effectively.