Absolute thresholds for blue-green and red stimuli were measured along the horizontal and vertical meridians in two patients with X-linked retinitis pigmentosa. From these data, we deduced that cones mediate detection of both stimuli in the central 10°, there is a ring scotoma in the mid-periphery, and in the far periphery rods mediate detection of both stimuli. Conclusions drawn from the psychophysical measures about rod and cone function across the retina are in point-by-point agreement with the data of a recent electron microscopic study by Szamier et al. on the retina of a 24-year-old X-linked retinitis pigmentosa patient.
|Original language||English (US)|
|Number of pages||4|
|Journal||Investigative Ophthalmology and Visual Science|
|State||Published - Jan 1 1979|
ASJC Scopus subject areas
- Sensory Systems
- Cellular and Molecular Neuroscience