How can I Watch a Solar Eclipse Without Hurting my Eyes?

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  • Written By: Mary McMahon
  • Edited By: Bronwyn Harris
  • Last Modified Date: 30 July 2018
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A solar eclipse can be an event to remember, especially if you are fortunate enough to be present for a total eclipse. It is important to take care of your eyes when you watch a solar eclipse, however, as the sunlight can cause serious retinal damage. Fortunately, there are a number of safe ways to view one, ranging from wearing special glasses to using indirect observation through a so-called pinhole camera.

Most people are aware that looking directly at the sun is dangerous, since the light can cause retinal burns. If someone looks at the sun long enough, these burns can actually cause blindness. During a partial or annular eclipse, the light from the sun is still bright enough to hurt your eyes, even though the world is darker than usual. During a total eclipse, it is technically safe to look at the sun directly, but as soon as the eclipse moves out of totality, you can damage your eyes.

If you want to be able to look directly at the sun during an eclipse, you will need special glasses. Unlike sunglasses, eclipse glasses filter out more of the sun's rays, making it safe to look at the sun directly for several minutes. Heavy duty welding glasses can also be used as eclipse glasses, if you have access to a set. Many science stores sell eclipse glasses, and observatories sometimes hand them out to groups who gather to watch the event.


You can also use a mirror to project the image of the eclipse onto a surface such as the side of a house. Be careful when doing this, as you do not want to flash light into someone's face or eyes. To use a mirror, use heavy tape to mask out most of the surface of a hand mirror, leaving around 1 inch (2.54 cm) of the mirror clear. Point the mirror at the sun and then angle it at a surface so that you can watch the eclipse in projected form.

A pinhole camera will also allow you to watch a solar eclipse safely. To do this, cut a small hole in a piece of heavy paper or cardboard. Stand with your back to the sun and hold the piece of paper with the pinhole over a white sheet of paper. With some adjustment, a small image of the sun will appear. You can change the focus by moving the top sheet of paper around until the picture becomes crisp, and then you can enjoy the solar eclipse without the risk of eye damage.


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Post 9

Negatives without silver in them (color negatives and some new black/white negatives), and negatives with a picture on them rather than solid black, must not be used.

CDs CAN be used provided that they shade the sun enough. The layer of aluminum on the CD is what makes it safe to use. The metal absorbs UV radiation.

Post 8

Find yourself some negatives of photos. The ends of each tape is really dark black. I placed 4 of those on top of each other and stapled them. it is big enough to look from one eye and i made a surrounding paper with printer paper so its not so bright around it. I can see it very clearly!! no blotches afterwards. Just be sensible, don't look too long... :)

Post 7

There are a bunch of sites that will tell you how to make viewers.. You may not be able to look directly at the sun, but you can see what is happening through them.. Also try using your digital camera to take pictures that will last forver

Post 5

Excellent warning on eye safety. FYI: Simple video instructions for constructing a viewing box (or Sun Scope) out of everyday materials is available online. Do a search on "how to build a sun scope" to find them.

Post 4

we are having a solar eclipse tomorrow and i can't get any solar eclipse glasses. can you make your own solar eclipse glasses?

Post 3

Eclipse viewers and glasses are made with special filter materials that block ultraviolet and infrared radiation in addition to visible light. Materials like CDs and stacked sunglasses that just block visible light will still allow dangerous UV and IR to damage your eyes.

Never improvise! A welding supply shop can sell you a No. 14 filter, the darkest shade available, cheaply. This is safe for solar viewing, but lower numbers, meaning lighter shades, are not safe.

For general information about eye safety and eclipse viewing, check with NASA. Two sources of certified eclipse viewers are Rainbow Symphony and Thousand Oaks Optical.

Post 1

Where can I get special glasses for watching solar eclipses?

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