WSIL-TV -- When viewing a solar eclipse you must keep safety first. The American Astronomical Society offers the following advice for viewing a solar eclipse:
The only safe way to look directly at the uneclipsed or partially eclipsed Sun is through special-purpose solar filters, such as “eclipse glasses” or handheld solar viewers.
Homemade filters or ordinary sunglasses, even very dark ones, are not safe for looking at the Sun. To date three manufacturers have certified that their eclipse glasses and handheld solar viewers meet the ISO 12312-2 international standard for such products: Rainbow Symphony, American Paper Optics, and Thousand Oaks Optical.
Instructions for safe use of solar filters/viewers:
An alternative method for safe viewing of the partially eclipsed Sun is pinhole projection (to see how to make a pinhole projector, click here or for a helpful video on using binoculars for viewing the eclipse, click here).
A solar eclipse is one of nature’s grandest spectacles. By following these simple rules, you can safely enjoy the view and be rewarded with memories to last a lifetime.
This safety information has been endorsed by the American Astronomical Society, the American Academy of Ophthalmology, the National Aeronautics and Space Administration, the American Academy of Optometry, and the National Science Foundation.
Note: This document does not constitute medical advice. Readers with questions should contact a qualified eye-care professional.
(Source: American Astronomical Association)