1. Soft velvet material The glasses patch is made of soft velvet material, which fits your glasses comfortably without putting pressure on your eyes. 2. Training the lazy eye helps to cover eye conditions on a daily basis, and is very suitable for treating lazy eye amblyopia and strabismus. This eye mask is ideal for those who need to wear eye masks on a regular basis. 3. Better treatment effect: The glasses cover can cover your glasses and block all vision of the eyes without light leakage. It can also be washed. Provide you with better eye correction results. 4. Easy to use You just slide the eyecup onto the glasses holder and wrap it around to cover the lenses. 5. The package includes 4 pieces of glasses eye patches, each patch size is 10x 5 cm (length x width), suitable for the left or right side of children's glasses. Please check the height of your glasses before ordering.