How to safely watch a solar eclipse

A solar eclipse is definitely a rare celestial event, and for people wishing to actually watch it, it’s important to remember to use proper protection to prevent eye damage. It is recommended by the Canadian Space Agency to wear special glasses with filters designed for eclipse watching (ISO 12312-2 international standard) as regular sunglasses will not protect your eyes sufficiently.1 Regular sunglasses allow thousands of times more sunlight than is safe to reach your eyes whereas the ISO standard glasses only allow a maximum of 0.0032 percent of light to pass through.

How to safely watch a solar eclipse

A solar eclipse is definitely a rare celestial event, and for people wishing to actually watch it, it’s important to remember to use proper protection to prevent eye damage. It is recommended by the Canadian Space Agency to wear special glasses with filters designed for eclipse watching (ISO 12312-2 international standard) as regular sunglasses will not protect your eyes sufficiently.1 Regular sunglasses allow thousands of times more sunlight than is safe to reach your eyes whereas the ISO standard glasses only allow a maximum of 0.0032 percent of light to pass through.

Dinosaurs don’t need glasses.
But your kid might.

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SOLAR ECLIPSE OFFER

From now until April 8th, 2024, get a free pair of eclipse glasses after your eye exam at FYidoctors.


(Offer applies to select provinces only who are in the direct path of the eclipse - ON, NL, NB, NS, PEI, & QC. One pair per patient, per eye exam, while quantities last.)

Visit a clinic

SOLAR ECLIPSE OFFER

From now until April 8th, 2024, get a free pair of eclipse glasses after your eye exam at FYidoctors.


(Offer applies to select provinces only who are in the direct path of the eclipse - ON, NL, NB, NS, PEI, & QC. One pair per patient, per eye exam, while quantities last.)

Visit a clinic

Tips for Safe Viewing of the Solar Eclipse

The only safe way to look directly at the sun is through specifically designed solar filters. These filters are used in both “eclipse glasses” or in solar eclipse viewers you hold up to your eyes.

Even if they are very dark, your regular sunglasses do not provide sufficient protection for viewing the solar eclipse.


While it might be tempting to conveniently purchase an inexpensive pair of solar-eclipse glasses from online vendors, this puts you at significant risk of buying unsafe or counterfeit glasses that won't provide your eyes with adequate protection.


When looking through an authentic solar filter, you should not be able to see anything except the sun or equally bright light, such as the reflection of sunlight off a mirror.


If you can see ordinary lights through your eclipse glasses or handheld viewer, they aren’t safe and you are at a higher risk of damaging your eyes.


Check your solar filter or eclipse glasses for any damage before using them. Any damage impacts the device’s ability to protect you, so don’t use them if you see any scratches or dents.


Never look at the sun through an unfiltered camera, telescope or binoculars, even with eclipse glasses. By design, these lens-based devices intensify light rays, damaging the protective properties of eclipse glasses and your eyes.

Retinal Risk

Staring directly at the sun at any time can cause serious and irreversible eye damage. The retina (which is the back of your eye) has no pain receptors, so it’s hard to feel any damage happening at the moment, and the effects of retinal damage may not appear until hours later.

Eye damage symptoms caused from looking at an eclipse?

Blurry vision

A blind spot in your central vision in one or both eyes

Distortion in which a straight line looks bent or a door frame looks curvy  

Changes in the way you see colour, known as “dyschromatopsia”  

Increased sensitivity to light  

Eye pain or grittiness

If you experience any of these symptoms contact your optometrist immediately. 


Approved Glasses Vendors

Due to the popularity of this phenomenon, solar eclipse glasses face potential shortages and many people may look online to purchase them.  The American Astronomical Society has compiled a list of vendors where you can purchase ISO 12312-2 certified glasses.  

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For more information about your eye health and eye protection, speak to an Optometrist today.

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