A solar eclipse is coming. Learn how to watch it safely
Posted by: Pepose Vision Institute in Pepose Info on July 8, 2017
On August 21st, a solar eclipse will be visible in Missouri. This will be the first eclipse of it’s type in the continental United States since 1979. The total eclipse is expected to occur about 1 p.m. and will last approximately 2 minutes and 40 seconds.
Although the effects of the eclipse will be visible across the U.S., Missouri and Illinois are in a path that will be under a total eclipse for the first time since the 1400s.
Pepose Vision invites you to enjoy this rare occurrence but to do so with caution. Please read below to learn more about how to view it safely.
A truly awe-inspiring event, a solar eclipse is when the moon blocks any part of the sun from our view. The bright face of the sun is covered gradually by the moon during a partial eclipse, lasting a few hours. During the brief period of a total eclipse when the moon fully covers the sun (only a couple of minutes), the light of day gives way to a deep twilight sky. The sun’s outer atmosphere (called the solar corona) gradually appears, glowing like a halo around the moon in front of it. Bright stars and planets become more visible in the sky.
Watching a solar eclipse is a memorable experience, but looking directly at the sun can seriously damage your eyes. Staring at the sun for even a short time without wearing the right eye protection can damage your retina permanently. It can even cause blindness, called solar retinopathy.
There is only one safe way to look directly at the sun, whether during an eclipse or not: through special-purpose solar filters. These solar filters are used in “eclipse glasses” or in hand-held solar viewers. They must meet a very specific worldwide standard known as ISO 12312-2.
Keep in mind that ordinary sunglasses, even very dark ones, or homemade filters are not safe for looking at the sun.
Steps to follow for safely watching a solar eclipse:
• Carefully look at your solar filter or eclipse glasses before using them. If you see any scratches or damage, do not use them.
• Always read and follow all directions that come with the solar filter or eclipse glasses. Help children to be sure they use handheld solar viewers and eclipse glasses correctly.
• Before looking up at the bright sun, stand still and cover your eyes with your eclipse glasses or solar viewer. After glancing at the sun, turn away and remove your filter—do not remove it while looking at the sun.
• The only time that you can look at the sun without a solar viewer is during a total eclipse. When the moon completely covers the sun’s bright face and it suddenly gets dark, you can remove your solar filter to watch this unique experience. Then, as soon as the bright sun begins to reappear very slightly, immediately use your solar viewer again to watch the remaining partial phase of the eclipse.
• Never look at the uneclipsed or partially eclipsed sun through an unfiltered camera, telescope, binoculars or other similar devices. This is important even if you are wearing eclipse glasses or holding a solar viewer at the same time. The intense solar rays coming through these devices will damage the solar filter and your eyes.
If you have any questions about the eclipse and eye safety, please contact us.
Information provided by American Astronomical Society
Pepose Vision is happy to provide free eclipse glasses to our patients.
Just come by the office and ask for your pair.