# Paragon CRT® Lens Calculator — CooperVision Specialty EyeCare > Eye care professional tool for calculating Paragon CRT lenses. (iPhone/iPad app by CooperVision Ltd.) - Source: https://appshunter.io/ios/app/paragon-crt-lens-calculator/id1576661697 (this page in markdown: same URL + `.md`) - Developer: [CooperVision Ltd](https://appshunter.io/developer/922445935) - Category: Medical, Utilities - Price: Free - Rating: 5.00/5 from 5 App Store ratings - Age rating: 17+ - Requires: iOS 13.0 · 20 MB - Languages: American English - Released: 2021-09-28 - Data updated: 2026-06-06 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/paragon-crt-lens-calculator/id1576661697/reviews.md ## What is Paragon CRT® Lens Calculator? The Paragon CRT® Lens Calculator is a free, multifunctional prescription calculator designed to allow eye care professionals to quickly and accurately calculate the optimal CRT lenses for their patients. Prescription Calculator Reduce chair time and make the fitting process for CRT patients simpler and more efficient. Quickly calculate and evaluate myopic prescriptions on the fly or from your office. Choose between 6mm or 5mm Optic Zone Diameter. Additional Benefits Additional benefits of the Paragon CRT® Calculator include the ability to share results of the calculated prescriptions and to contact CooperVision SEC with any questions or concerns you have with the education link inside the calculator. The Paragon CRT® Lens Calculator is an educational lens fitting tool intended for professional eye care provider use. Only licensed eye care providers may place Paragon CRT lens orders. Eye care professionals may choose to use the app as part of their patient evaluation. The Paragon CRT® Lens Calculator is not intended as and does not constitute medical or optometric advice and eye care professionals should rely on their own expertise. ## Key features - Prescription calculator - Optic Zone Diameter selection - Shareable results - Educational fitting tool - Contact CooperVision SEC - Myopic prescription evaluation ## Frequently asked questions about Paragon CRT® Lens Calculator ### What is the primary function of Paragon CRT Lens Calculator? The primary function of Paragon CRT Lens Calculator is to help eye care professionals quickly and accurately calculate optimal CRT lenses for their patients, simplifying the fitting process. ### Who is authorized to use Paragon CRT Lens Calculator? Only licensed eye care providers are authorized to use Paragon CRT Lens Calculator. It is intended as an educational lens fitting tool for professional use. ### Can Paragon CRT Lens Calculator be used for general medical advice? No, Paragon CRT Lens Calculator is not intended to provide medical or optometric advice. Eye care professionals should rely on their own expertise when using the tool. ### What are the available Optic Zone Diameter options in Paragon CRT Lens Calculator? Paragon CRT Lens Calculator allows users to choose between a 6mm or 5mm Optic Zone Diameter for their calculations. ### Does Paragon CRT Lens Calculator offer a way to share patient prescription results? Yes, Paragon CRT Lens Calculator includes the ability to share the results of calculated prescriptions with others. ### How often is Paragon CRT Lens Calculator updated? The latest version of Paragon CRT Lens Calculator is 1.2.1, last updated on February 23, 2026. This indicates a recent update, suggesting ongoing support. ### What devices is Paragon CRT Lens Calculator compatible with? Paragon CRT Lens Calculator is compatible with iPhone, iPad, and iPod devices. ### Does Paragon CRT Lens Calculator contain advertisements? No, Paragon CRT Lens Calculator does not contain advertisements. It is a free application without any ads. ## Version history (last 5 releases) ### 1.2.1 — 2026-02-23 Various UI improvements and bug fixes. ### 1.2.0 — 2025-02-11 Now includes a 5>6 / 6>5mm converter tool. ### 1.1.0 — 2024-07-18 app and SDK updates ### 1.0.2 — 2021-12-06 Fix on Splash screen ### 1.0.1 — 2021-10-03 1st Version ## Apps similar to Paragon CRT® Lens Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [OE TRACKER attendance app](https://appshunter.io/ios/app/oe-tracker-attendance-app/id533351358) | 4.4 (34) | Free | Medical | | [Eyefinity EHR for iPhone](https://appshunter.io/ios/app/eyefinity-ehr-for-iphone/id1178730340) | 2.3 (18) | Free | Medical | | [Eyefinity EHR](https://appshunter.io/ios/app/eyefinity-ehr/id746215884) | 3.0 (103) | Free | Medical | | [KMK Optometry Coaching](https://appshunter.io/ios/app/kmk-optometry-coaching/id1645627925) | 4.9 (31) | Free | Medical | | [The Wills Eye Manual](https://appshunter.io/ios/app/the-wills-eye-manual/id1143476337) | 4.7 (125) | Free | Medical | | [Ophthalmology & Optometry App](https://appshunter.io/ios/app/ophthalmology-and-optometry-app/id6471442410) | 4.7 (100) | Free | Medical | ## More apps by CooperVision Ltd - [OptiExpert™](https://appshunter.io/ios/app/optiexpert/id922445936) - [CooperVision RU Event](https://appshunter.io/ios/app/coopervision-ru-event/id1486602912) - [OptiStudent™](https://appshunter.io/ios/app/optistudent/id1634620301) All apps by CooperVision Ltd: https://appshunter.io/developer/922445935 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-06.*