Optometrists are warning people about looking to the skies for the upcoming Great Eclipse without the right viewing glasses.
NASA says you must have approved solar viewing glasses with the ISO Number 12312-2.
Optometrists say viewing it without glasses can expose your eyes to damage and can hinder vision in the long term.
The glasses should be inspected before using them.
The American Optometry Association says viewing glasses can be removed only within the path of totality and when the moon completely blocks the sun.
They must be put back on once the sun starts reappearing.
(This story was originally published on July 31, 2017)