Clear, durable poly carbonate material allows face coverage that will not affect movement. Our 10 in. x 10 in. shield fits over various oculars on most slit lamps. Poly-carbonate is a tough, transparent plastic material with outstanding strength, stiffness, and impact resistance. Poly-carbonate's optical clarity makes it ideal for applications such as sneeze guards or shields. Unlike Acrylics, poly-carbonate materials are able to be cleaned with most chemicals without the chance of hazing.