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[The comparative study of the macular light threshold in the normal and low visual acuity people]
1Zhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, Guangzhou, China.
Purpose:
To test the macular light threshold (MLT) and the change of macular light sensitivity (MLS) in the normal and low visual acuity people.
Methods:
MLT of 93 eyes of the normal and 76 eyes of low visual acuity people was measured with macular threshold test of Humphrey Field Analyzer-640.
Results:
1. MLT increases with age, there is a negative correlation between MLS and age 2. MLT of low visual acuity people is significantly higher than that of the normal visual acuity people in the same age group; 3. No significant difference of MLT was found in the four quadrants of visual field in the same age group; 4. No significant difference of MLT was found between male and female.
Conclusions:
MLS of the normal visual acuity people is superior to that of the low visual acuity people; MLS decreases with age.