On August 21st, 2017 the United States will fall under the path of a solar eclipse
Prior to the development of intense man made light sources (i.e. lasers, intense lamps) the sun was virtually the only source of radiation with potential to damage the eye. The unprotected eye continues to be vulnerable when viewing the sun under poor geometry conditions, long term exposures (100 s or greater), increased intensity, pupil dilation and a solar eclipse….
Solar retinopathy involves absorption of a percentage of light on the outermost layers of the retina, resulting in an increase in tissue temperature, and potential for tissue damage. Photochemical damage occurs for the more energetic waves of light, ultraviolet (UVA and UVB). Over exposure to intense light sources can result in temporary impairment or permanent eye damage. Consider the fact that direct eclipse viewing without protective equipment can result in acute solar retinopathy.