- Grid glasses for eye training. - Suitable for close and long distance use. - Material: plastic, colour: black. - Weight: 24 g. - Dimensions: approx. 140 mm (arm length), 150 mm (width). - Significantly improved visual acuity when looking through the small holes (phenomenon: stenopean gap). Box contents: 2 x black grid glasses.

Wearing them for 15 minutes everyday will help to improve your eyesight within 2-4 weeks. The theory is very simple: when you can only see through small holes, the eyes naturally move the focus to a relaxed level to relieve the eyeballs. Resting glasses help to improve eyesight of shortsighted eyes. Black. Unisex. Size: one size fits all. Material: plastic.Weight: 40 g.