26+ Vertex Contact Lens Calculator. Contact lenses sit directly on your eye, while glasses sit at a distance (the vertex distance), which affects the required prescription strength. This calculator accounts for the vertex distance to ensure accurate contact lens power.

Contact lenses sit directly on your eye, while glasses sit at a distance (the vertex distance), which affects the required prescription strength. The contact lens vertex calculator is a helpful tool that is designed to adjust spectacle prescriptions into accurate contact lens prescriptions. (fc) is the corrected lens power in diopters,.







