These disposable occluders are directed toward pediatric vision testing. Each occluder has a Patti Pics face and a place for the child's name. This helps to make pediatric vision testing more fun for the child, and easier for the adult. Each occluder is made from heavy paper stock, making them disposable but durable enough to withstand handling. Patti Pics occluders are great to keep the attention of the child during testing.