title: Theoretical computation of the refractive index in an ophthalmic lens.
abstract: In this technical note, the theoretical value of the refractive index of an ophthalmic lens is derived from central thickness and from power as measured with a focimeter and a lens gauge.
mesh_terms: D006801:Humans; D007909:Lenses; D008962:Models, Theoretical; D009907:Optometry / Q000379:methods*