NASA officials and the American Astronomical Society verified five manufacturers making solar eclipse glasses that meet all glasses standards - American Paper Optics, Baader Planetarium - AstroSolar Silver and Gold film only, Rainbow Symphony, Thousand Oaks Optical and TSE 17.
The first total solar eclipse to cross the country in more than a generation is coming Monday, Aug. 21.
If you look at the sun without protective eyewear the solar radiation and thermal energy from the sun can burn the retinal tissue.
The only one way to safely view a partial or total eclipse is with certified solar glasses - simple sunglasses are not enough.
Getting the chance to watch a solar eclipse is incredible but could also do serious damage to a person's eyes when he or she is not using the proper equipment.
The AAS warns the "marketplace is being flooded by counterfeit eclipse glasses that are labeled as if they're ISO-compliant when in fact they are not".
DIY eclipse viewers were discouraged by the AAS because of the safety risks.
Solar eclipse glasses offer protection from vision loss
The organization also has a list of retailers that stock glasses made by verified manufacturers at some (but not all) of their locations. "It's very exciting for them and they want to take the eye protection off", said Van Gelder.
Northern San Luis Obispo County (Cambria, Paso Robles) will see the moon cover 67-percent of the sun.
Patricia Spencer, Lewis and Clark Library Public Information Officer, believes that people's feelings about the eclipse will change during the actual experience.
The 70-mile-wide swath of land where the full spectacle can be seen stretches from OR to SC, with 12 states in its path.
The Great American Eclipse is coming up, and reports are coming in of people being scammed by fake eclipse glasses.
"For instance, if you were looking at the word "CAT", they may be able to see the "C" and the "T", but miss the "A".