Contact Lens Vertexing Calculator
Right Eye — Spectacle Prescription
Contact Lens Prescription
FAQs
A Contact Lens Vertexing Calculator helps convert a glasses prescription into the correct contact lens power. It accounts for the distance between eyeglass lenses and the eye, which becomes important for stronger prescription
Vertex distance adjustments are typically needed when the prescription is greater than ±4.00 diopters. For lower prescriptions, the difference is usually too small to have a noticeable effect on vision.
No. The calculator provides an estimated contact lens power based on your eyeglass prescription. A complete contact lens fitting by an eye care professional is still necessary to determine the correct lens type, fit, and final prescription.
The calculator uses standard optical formulas to estimate lens power, making it a reliable reference. However, the final prescription should always be confirmed by an optometrist or ophthalmologist, as individual eye characteristics can affect the result.
