People are getting excited about Monday's total solar eclipse, when the moon completely blocks out the sun!
Though the eclipse is only visible for a couple minutes, looking directly at it can cause permanent damage to your sight. Using these to view the eclipse can cause loss of color and/or central vision :
Quick glances or squinting at a partial eclipse 
Sunglasses, including dark or polarized
Unfiltered camera or telescope lenses
Pay careful attention to whether the sun is fully eclipsed! Total eclipse only happens along a relatively narrow path across the country, for a short amount of time.
Eclipse Phases. NASA
NPR's Nell Greenfieldboyce says, "That crescent of sun is glowing every bit as brightly as it would on a day when there isn't a solar eclipse." If planning to view the eclipse directly, protect your eyes with eclipse glasses. For direct viewing, you need ISO 12312-2 protective glasses. Buy them locally from of the a few of the following retailers:
Toys "R" us
Do not use wrinkled or scratched lenses, or lenses older than 3 years.