J Korean Ophthalmol Soc.
1972 Dec;13(4):231-237.
Critical Fusion Frequency in Normal Eyes
- Affiliations
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- 1Department of Ophthalmology, College of Medicine, Seoul National University, Seoul, Korea.
Abstract
- C.F.F. in 14 normal eyes with normal visual acuity was examined at central, 5 degrees and 10 degrees to the nasal and temporal portion in the horizontal meridians with rotating sectored disc(light dark ratio=1:1). The distance between the target and the subject was 50cm. 1. C.F.F. was higher in the mydriatic state than in the miotic state, examined with the suround illumination of 50 lux. 2. C.F.F. was higher with 2cm target than with 1cm target, examined with the surround illumination of 50 lux in the mydriatic state. 3. C.F.F.was higher in the light adapted state than in the dark adapted state, examined in the mydriatic state. 4. The more the examined field located peripherally, the higher the C.F.F.
