Orion 5942 AstroGoggles 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