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Observations demonstrate visual performance changes after high intensity light exposure in humans, indicating potential risks to retina health.
Threshold data for retinal lesions in man exposed to short flashes (135 ms) of intense white light were obtained. Retinal image diameter of the light beam was approximately 1.4 mm. Visual performance tests employed before and after exposure are discussed. The data are compared with those obtained from animal experimentation (rabbits and Rhesus monkeys). Energy levels required to elicit opbthalmoscopically‐visible minimal lesions in the human eye ranged between 4.9–15.7 J/cm 2 depending upon fundus pigmentation. In one case 13.0 J/cm 2 applied to the macula directly caused only minimal temporary visual acuity loss, but no visible lesion. The data compare to 5.54 to 7.6 J/cm 2 for lesions in monkey retinae, and 4.06 to 4.14 J/cm 2 in rabbit eyes.
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Geeraets et al. (1973) studied this question.
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