Snow goggles

Snow goggles (Inuktitut: ilgaak or iggaak, syllabics: ᐃᓪᒑᒃ or ᐃᒡᒑᒃ; Yup'ik: nigaugek, pl. nigauget) are a type of eyewear traditionally used by the Eskimo people of the Arctic to prevent snow blindness.

The goggles are traditionally made of driftwood (especially spruce), bone, walrus ivory, caribou antler, or in some cases seashore grass. The workpiece is carved to fit the wearer's face, and one or more narrow horizontal slits are carved through the front. The goggles fit tightly against the face so that the only light entering is through the slits, and soot is sometimes applied to the inside to help cut down on glare. The slits are made narrow not only to reduce the amount of light entering but also to improve the visual acuity. The greater the width of the slits the larger the field of view.