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The literature relating aging and dark adaptation is discussed. The final threshold shows a significant rise in the increase in age which is more marked above the age of 60. The effects of stimulus(More)
An understanding of the spectral composition of sunlight is necessary if the effects of human exposure and protection criteria are to be meaningful. Also provided is a brief review of data for the(More)
The literature relating visual acuity and the aging process is reviewed. The Snellen fraction, parameters affecting visual acuity and difficulties in comparing different studies in visual acuity are(More)