9D43
category
Impairment of contrast vision
Definition
Contrast sensitivity refers to the ability to distinguish small differences in brightness between adjacent surfaces. Peak Contrast sensitivity refers to the smallest differences that are discernible for large stimuli. For smaller objects, such as those involved in many Activities of Daily Living, contrast sensitivity interacts with visual acuity and visual field. Better contrast makes smaller details visible. The visual field is larger for stronger stimuli.
Also indexed as
Impairment of contrast visionModerate impairment of contrast visionProfound impairment of contrast vision
Nearby in Impairment of visual functions
9D41Impairment of visual field9D42Patterns of visual field impairment9D44Impairment of colour vision9D45Impairment of light sensitivity9D46Impairment of binocular functions9D50-9D5ZSubjective visual experiences4B4YOther specified diseases of the immune system4B4ZDiseases of the immune system, unspecified