Refractive Converter

Refractive Converter helps you quickly convert combined sphere and cylinder eyeglass prescriptions into a single spherical equivalent value.

Many contact lens fittings, screening tools, and quick reference calculations call for a spherical equivalent rather than a full sphere/cylinder/axis prescription. Instead of doing the math by hand, enter your sphere and cylinder values and get an accurate spherical equivalent instantly.

Key features: fast and accurate spherical equivalent calculations, a simple and clean interface designed for quick everyday use, support for both eyes independently, and no account or sign-up required.

Disclaimer: This app is intended for informational and quick-reference purposes only. It is not a medical device and is not intended to diagnose, treat, or provide a substitute for a comprehensive eye examination. Calculations are based on user-entered values, and accuracy depends on the information provided. Always consult a licensed optometrist, ophthalmologist, or other qualified eye care professional before making decisions about corrective lenses, contact lenses, or any aspect of your eye health. The developer assumes no liability for outcomes resulting from use of this app.