Overview
Estimate contact lens power from a glasses prescription using 12mm vertex distance and principal-meridian astigmatism conversion.
ptiConvert is a simple glasses-to-contact lens power estimator that helps you understand how spectacle prescription values may change when converted to the contact lens plane. Using the standard 12mm vertex distance formula, OptiConvert estimates contact lens power from your glasses prescription. For astigmatism, it converts both principal meridians and reconstructs SPH and CYL values for a more clinically grounded estimate. Features: - Convert glasses SPH values to estimated contact lens power - Support CYL and Axis inputs for astigmatism - Uses 12mm vertex distance calculation - Rounds results to standard 0.25D increments - Calculates both right eye (OD) and left eye (OS) - Runs locally in your browser - No account required Important disclaimer: OptiConvert provides educational estimates only. It is not medical advice and does not replace a professional eye exam or contact lens fitting. Contact lenses require professional evaluation of base curve, diameter, lens material, brand suitability, eye health, comfort, and fit. Always confirm with a licensed eye care professional before purchasing or wearing contact lenses.
Details
- Version1.0.0
- UpdatedMay 14, 2026
- Size9.26KiB
- LanguagesEnglish
- DeveloperWebsite
Email
constantince007@gmail.com - Non-traderThis developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.
Privacy
OptiConvert — Glasses to Contacts Calculator has disclosed the following information regarding the collection and usage of your data. More detailed information can be found in the developer's privacy policy.
OptiConvert — Glasses to Contacts Calculator handles the following:
This developer declares that your data is
- Not being sold to third parties, outside of the approved use cases
- Not being used or transferred for purposes that are unrelated to the item's core functionality
- Not being used or transferred to determine creditworthiness or for lending purposes
Support
For help with questions, suggestions, or problems, visit the developer's support site
