Astrogoggles help your eyes become dark-adapted before you observe the night sky through a telescope or binoculars
Wear AstroGoggles inside for about a half-hour before observing, or while setting up your telescope, to make your eyes dark-adapted
Deep red plastic lenses filter out the wavelengths of light that ruin dark adaptation
Large enough to wear over eyeglasses
Air vents help prevent fogging
Spend a half-hour wearing AstroGoggles before using your telescope, then take them off just before peering into the eyepiece. Your eyes will already be dark-adapted! Put on Orion AstroGoggles when you go inside during an observing session to retain your dark-adapted vision while inside under houselights. Air vents eliminate fogging. Large enough to wear over eyeglasses. Elastic band.