Which term refers to eye turning only when binocular viewing is broken and two eyes are no longer looking at the same object?

Which term refers to eye turning only when binocular viewing is broken and two eyes are no longer looking at the same object?

• A. Phoric
• B. Trophic
• C. Residual vision
• D. Braille embosser

Answer: (A)

The concept here is a latent eye misalignment that only shows up when binocular viewing is disrupted. When both eyes normally try to focus together, they stay aligned; but if fusion is broken—for example, when one eye is covered—the eyes may drift to a new position. This kind of deviation is called a phoric deviation, and the adjective form describes the condition as phoric. In practice, a phoria is a latent misalignment detected with dissociation tests, unlike a tropia, which is a manifest misalignment present even when both eyes are viewing the same object. The other terms listed don’t fit this situation: trophic relates to nourishment, residual vision means remaining functional sight, and a braille embosser is a device for producing braille.

The concept here is a latent eye misalignment that only shows up when binocular viewing is disrupted. When both eyes normally try to focus together, they stay aligned; but if fusion is broken—for example, when one eye is covered—the eyes may drift to a new position. This kind of deviation is called a phoric deviation, and the adjective form describes the condition as phoric. In practice, a phoria is a latent misalignment detected with dissociation tests, unlike a tropia, which is a manifest misalignment present even when both eyes are viewing the same object. The other terms listed don’t fit this situation: trophic relates to nourishment, residual vision means remaining functional sight, and a braille embosser is a device for producing braille.