Spatial and temporal vision of macaques after central retinal lesions
Spatial contrast and temporal modulation sensitivity of two macaque monkeys were measured at three luminance levels before and after binocular laser coagulation of the fovea. The radius of the lesions ranged from 1.6 to 2.2 degree from the center of the fovea. After placement of the lesions, the visibility of high spatial frequencies was greatly reduced, although sensitivity at middle and low spatial frequencies was unaffected. No loss of spatial resolution was found at the lowest luminance tested. When temporal modulation sensitivity was tested with 4 deg targets, foveal lesions had no effect at any temporal frequency or luminance. However, with a 0.57 degree target, sensitivity to lower temporal frequencies was impaired. Thus visual loss after destruction of the fovea is limited to high luminance, small targets, and the resolution of fine detail.
- Research Organization:
- Univ. of Rochester, NY
- DOE Contract Number:
- AC02-76EV03490
- OSTI ID:
- 5239635
- Journal Information:
- Invest. Ophthalmol. Visual Sci.; (United States), Vol. 21:1
- Country of Publication:
- United States
- Language:
- English
Similar Records
Background and stimulus-induced patterns of high metabolic activity in the visual cortex (area 17) of the squirrel and macaque monkey
Background and stimulus-induced patterns of high metabolic activity in the visual cortex (area 17) of the squirrel and macaque monkey
Related Subjects
59 BASIC BIOLOGICAL SCIENCES
LASER RADIATION
BIOLOGICAL RADIATION EFFECTS
RETINA
RADIOSENSITIVITY EFFECTS
VISION
BIOLOGICAL MODELS
BIOCHEMICAL REACTION KINETICS
MACACUS
SPATIAL RESOLUTION
ANIMALS
BIOLOGICAL EFFECTS
BODY
BODY AREAS
ELECTROMAGNETIC RADIATION
EYES
FACE
HEAD
KINETICS
MAMMALS
MONKEYS
ORGANS
PRIMATES
RADIATION EFFECTS
RADIATIONS
REACTION KINETICS
RESOLUTION
SENSE ORGANS
VERTEBRATES
560121* - Radiation Effects on Cells- External Source- (-1987)
550200 - Biochemistry