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- W2353022182 abstract "(1) The effect of age upon dark adaptation. Dark adaptation curves were determined for 180 healthy subjects with the use of a Hartinger adaptometer. The age of subjects covers a range from 10 to 75. The differences in the time course of dark adaptation curve were analyzed among age-group of 10—15, 16—19, 20—29, 30—39, 40—49 and 50—75. Each group consists of 30 subjects. The visual threshold finally attained increases with the advance of age from 16 to 75. However, as the age decreases below 16, visual threshold increases again, i. e., that of age-group 10—15 is higher than that of age-group 20—29. The times at which the α and β kinks make their appearance are not statistically different among different age-groups. (2) The differences in the dark adaptation curves determined at different times of the day. The dark adaptation curves of the 30 normal subjects were determined in the morning, at noon and in the night. The final threshold was found to be lowest when the determination was made in the night, while highest at noon. Differences were statistically significant within the thirty-minute period. After 35 minutes, the difference was significant only between those determinations made at noon and in the night. The maximum difference of average threshold between determinations made at noon and in the night is 0. 33 log_10 unit; that between morning and noon, 0. 22 log_10 unit; and that between morning and night, 0. 17 log_10 unit. It is likely that these differences were due to differences in the environmental luminance at different times of the day." @default.
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- W2353022182 date "1963-12-01" @default.
- W2353022182 modified "2023-09-23" @default.
- W2353022182 title "[SOME OBSERVATIONS ON DARK ADAPTATION CURVE OF CHINESE SUBJECTS WITH NORMAL VISION]." @default.
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