Back Surface Toric RGPs by Dev1 | Sep 6, 2023 | Bookmarking Post, CONTACT LENSES | 0 comments Bookmark Please login to bookmarkClosePlease login Back Surface Toric RGPs have toricity on their back surface/ base curve. They should be used for patients with >2.50D of corneal toricity in order to follow the shape of the cornea and prevent the RGP from rocking due to the irregular surface.