Effects of Broadbanded Eye Protection on Dark Adaptation
1989
The effects of visible broadband attenuating filters (sunglasses) on final dark adaptation thresholds were examined with the aid of LED spectral dark adaptation measurements. We found a differential effect governed by spectral composition of the test light source. Peripheral dark adaptation functions measured with long-wavelength light showed no significant sunglass effect whereas such functions measured with intermediate spectral light significantly decreased in final visual thresholds. No differential spectral effects were obtained in control subjects who were not provided with sunglasses. Explanations with regard to static as well as dynamic peripheral receptor tuning mechanisms are discussed.
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