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    Top 5 ways to help your patients safely view the solar eclipse


    3. Lens solar filters (direct method)

    Lens solar filters can be applied to telescopes and binoculars for safe eclipse viewing. The purpose of the lens filters is to keep the sun’s heat and light out of the optics.

    “You should never look at the eclipse through a telescope or binoculars without appropriate solar filters applied to the larger lens,” says Dr. Haynes. “Do not view the eclipse with telescopes or binoculars over your eclipse glasses or solar shields, either.”

    Related: Relieve migraines with tinted contact lenses

    Three of the most common lens solar filters are:

    • Aluminized Mylar

    • Black polymer

    • Metal on glass

    Some filters display the sun as white, while others show an orange, yellow, or bluish tint.

    Dr. Semes cautions patients from using homemade lens filters.

    “Homemade filters consisting of unexposed X-ray film are potentially hazardous,” he says.

    Up next: Pinhole camera (indirect method)

    Giovanni Castelli
    Giovanni Castelli is the content specialist for Optometry Times. He is a 2014 graduate of Cleveland State University with a degree in ...


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