title: Calculating areal average thickness of rigid gas-permeable contact lenses.
abstract: A method to calculate areal average thickness of rigid contact lenses is shown. The method involves division of lens volume, which is determined from lens design specifications or derived from measured lens weight, by the area of the lens back surface. Areal average thickness may then be used with known oxygen permeability to generate oxygen transmissibility values.
mesh_terms: D003261:Contact Lenses; D008962:Models, Theoretical; D009907:Optometry / Q000379:methods*; D010100:Oxygen; D010539:Permeability
chemical_list: D010100:Oxygen