The sun can be viewed safely with the naked eye only during the few brief seconds of a total solar eclipse. Partial eclipses are never safe to watch without taking special precautions. Even when 99 percent of the sun is obscured during the partial phases of a total eclipse, the remaining photospheric crescent is intensely bright and cannot be viewed safely without eye protection. While environmental exposure to ultraviolet radiation is known to contribute to accelerated aging of the outer layer of the eye and the development of cataract, it is feared that improper viewing of the sun during an eclipse could lead to problems like ‘eclipse blindness’ and retinal burns.
- Because this celestial event does not want any eyewitness.
- Because the eclipsed sun frets and fumes and emits harmful ultraviolet rays.