Prototype base curve attachment for the topographer: what will replace the vanishing radiuscope?

Background: With the disappearance of the radiuscope, alternative methods must be developed to accurately measure gas-permeable (GP) lenses. The purpose of this study was to design, manufacture, and test a novel attachment for the evaluation of spherical base curves of GP rigid contact lenses using a corneal topographer.

Methods: A topographer attachment was devised with the intent of measuring the surface radii of GP lenses.