Comparison of monocular sensitivities measured with and without occlusion using the head-mounted perimeter imo

AI Generated Summary*

Sixteen visually normal adults (mean age 28.6 years) were tested on a head-mounted perimeter that measures each eye separately with both eyes open. Right-eye thresholds at 29 points within 25 degrees were compared under four conditions: left eye behind an opaque occluder, plus three unoccluded arrangements, one a random single-eye test. Binocular sensitivity was also recorded. Unoccluded thresholds were higher overall (P<0.01), with the gap significant beyond 5 degrees and absent at the fovea (P=0.53), and the three unoccluded conditions matched one another. Binocular sensitivity beat the best monocular value at the fovea and within 5 degrees but not further out. Investigators credit binocular interaction, though some gaps were under 1 dB in healthy eyes, leaving clinical relevance unsettled.

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