Case in point: you only have high - resolution vision in the very center of your eye — about 0.1 percent of your entire visual field. (scientificamerican.com)
Accurately measured bridge and eye size, vertex distance, temple length, pupillary distance and optical centers of eyes. (livecareer.com)
This is the case with age - related macular degeneration — a «wet» version of which causes vision loss in the center of the eye — and diabetic retinopathy — in which some people with diabetes develop blurry or patchy vision. (sciencedaily.com)