Contrast Sensitivity Test in Normal Thai

Jutalal Tanterdtam, M.D.,
Ngamkae Dongosintr, M.D.,
Yani Chiemchaisri, M.D.,
Departinent of Ophthalmology Faculty of Medicine, Siriraj Hospital, Mahidol University.


ABSTRACT Contrast sensitivity test was measured in normal Thai people age 5-60 years using the Vistech Contrast Sensitivity distance chart (VCT 6500).

The purpose of this study was to estab lish normative data in Thai people to assist clinicians in evaluating the patients. The normal range in Thai people is similar to the norms provided by the VCT 6500. Contrast sensitivity function of the right eye is not different from the left eye. One patch difference between right and left eye in any frequency is considered to be normal. A difference of two or more patches between the curve of each eye at any particular frequency or a difference of one patch at three or more frequencies should be watched carefully.

Thai J Ophthalmol 1994 ; July - December 8 (2): 113-119.