Effective Patching Treatment - These medical eye patches are approved to treat lazy eye Amblyopia Strabismus, which training the lazy eye to work properly.^ Super Soft Velvet Material - Skin friendly, Breathable, Comfortable, non-adhesive to the eye, super soft against the kids delicate skin and won"t scratch your glasses.^ Full Coverage&No Light Leakage - Our kids/adults eye patches offer full coverage without leakage, which provide better correction for the treatment.^ Perfect Fits Left & Right- Each single eyeglass patch is about 10 x 5cm, can be applied on the left or the right of children glasses, and fits perfectly and stay tightly.^ Easy to Use - Three-steps installation, and put the patch over the "good" eye. (Warming Tips: Please measure the lenses of glasses size before purchasing.) ^