Monocular Fixation Pattern
Consistent use of only one eye for fixation tasks, indicating significant functional difference between the eyes.
Full Definition
Monocular fixation pattern describes the behavioral tendency to consistently use the same eye for visual fixation while actively suppressing input from the fellow eye. This pattern typically develops in response to significant visual differences between the eyes, such as amblyopia, large refractive errors, or structural abnormalities. Assessment involves observing fixation behavior during various visual tasks and noting any resistance to covering the preferred eye. A strong monocular fixation pattern may indicate dense amblyopia in the non-preferred eye and can affect treatment planning, particularly regarding the aggressiveness of occlusion therapy needed. The pattern can be central, involving the fovea, or eccentric, using peripheral retinal areas.
Usage
Usage note: Specify which eye is preferred and describe the strength of the preference pattern.
In Context
- "The child demonstrated a strong monocular fixation pattern with the right eye, never spontaneously using the left eye for fixation." — Amblyopia assessment report
- "Development of alternating fixation from a monocular fixation pattern indicates improving binocularity with treatment." — Treatment progress documentation