FILE - Justin Coleman, of Birmingham, Ala., holds his glasses up to his eyes as he watches the solar eclipse atop a parking structure, Monday, Aug. 21, 2017, in Birmingham. Safe solar eclipse glasses block out the sun’s ultraviolet rays and nearly all visible light. When worn indoors, only very bright lights should be faintly visible – not household furniture or wallpaper. (AP Photo/Brynn Anderson, File)
This microscope image provided by Mount Sinai’s New York Eye and Ear Infirmary shows damage to the retina of a person who viewed the 2017 eclipse without adequate protection. She complained of a black spot in her vision, and doctors discovered retinal damage that corresponded to the eclipse’s shape. (New York Eye and Ear Infirmary of Mount Sinai, JAMA via AP)
FILE - Projected images of the eclipse are seen through the leaves on the trees on the sidewalk at the White House in Washington, Monday, Aug. 21, 2017. (AP Photo/Alex Brandon, File)
FILE - Reveka Pasternak, of Boston, left, and her sister Tristen, of Philadelphia, right, use pinhole projectors to view a partial solar eclipse, Monday, Aug. 21, 2017, on the campus of Massachusetts Institute of Technology, in Cambridge, Mass. The sisters made the pinhole projectors from cardboard that allow people to safely view the eclipse. (AP Photo/Steven Senne, File)
This microscope image provided by Mount Sinai’s New York Eye and Ear Infirmary shows damage to the retina of a person who viewed the 2017 eclipse without adequate protection, and a drawing by the patient showing the shape of what the visual artifact looks like to her. She complained of a black spot in her vision, and doctors discovered retinal damage that corresponded to the eclipse’s shape. (New York Eye and Ear Infirmary of Mount Sinai, JAMA via AP)