# Multifocal Lens Analyzer — Defocus Curve > Tool for vision professionals to measure multifocal lens visual acuity defocus curves. (iPhone/iPad app by Qvision, Departamento de Oftalmología.) - Source: https://appshunter.io/ios/app/multifocal-lens-analyzer/id1076177667 (this page in markdown: same URL + `.md`) - Developer: [Qvision, Departamento de Oftalmología](https://appshunter.io/developer/1602553646) - Category: Education, Utilities - Price: Free with in-app purchases - Rating: 3.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 13 · 6 MB - Languages: American English - Released: 2016-01-27 - Data updated: 2026-09-07 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/multifocal-lens-analyzer/id1076177667/reviews.md ## What is Multifocal Lens Analyzer? THIS IS A PROFESSIONAL APP BASED ON EVIDENCE JUST FOR PROFESSIONALS IN VISION SCIENCES The most popular method in clinical practice for evaluating the visual performance through the field with a Multifocal Intraocular Lens or a Multifocal Contact Lens is the Visual Acuity Defocus Curve. This application allows you to measure Defocus Curves with several advantages versus conventional charts. The application is based on a Freemium model, just downloading the App you will have access to the following options: 1.- Visual Acuity Defocus Curves 2.- Two possible distances (2 m and 4 m), 3.- Selecting a range of possible Defocus Lenses from +5.00 D to -5.00 D 4.- Snellen optotypes. BEFORE DOWNLOADING ON IPHONE YOU SHOULD KNOW: The functionalities differ depending on the installation on an iPad or iPhone: 1.- You need an iPad for conducting the Defocus Curve measurement 2.- If you install the MLA in an iPhone this only serves as a remote control, you will still need an iPad to measure the Defocus Curve 3.- You can access to more information about the procedure at:  https://defocuscurve.com/en/testing-defocus-curve A PRO version is also included with several options such as: 5.- Contrast Sensitivity Defocus Curve 6.- Optional steps of +/- 0.25D around de 0D step 7.- Sloan Optotypes (ETDRS) 8.- Auto-calculation of Sphere with Rx, Defocus and Distance 9.- Remote Control with another IOS device 10.- Historical Database to Store Defocus Curves 11.- Assign Defocus Curves to several Protocols (MIOLs or MCLs) 12.- Store Additional information (pupil, Rx, month, etc) 13.- Export Data to .CSV 14.- Calibrated considering several iPad models or the possibility of a personalized calibration. 15.- Area under the defocus curve calculation. INFORMATION ABOUT PRO SUBSCRIPTION The Multifocal Lens Analyzer is a freemium app. If you want to access to all the services you have to buy a PRO auto-subscription for 49.99€ (prices can vary between countries) for a period of 1 year. The payment will be charged to your iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. You can find our terms and privacy policy at https://www.defocuscurve.com/en/2-documentation/25-terms-conditions SUPPORT AND QUESTIONS You can access our webpage www.defocuscurve.com to view all the research validation papers or the authors that have used the App in their research. You can also join our community in order to ask any question or to receive support: www.facebook.com/groups/qvisionacademy/ ## Key features - Visual Acuity Defocus Curves - Defocus Lens Range Selection - Snellen Optotypes - Contrast Sensitivity Defocus Curve - Historical Database Storage - Data Export to .CSV ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Pro | $45.99 | per year | ## Frequently asked questions about Multifocal Lens Analyzer ### What is Multifocal Lens Analyzer used for? Multifocal Lens Analyzer is used by vision science professionals to measure visual acuity defocus curves for multifocal intraocular and contact lenses. It provides a digital method for evaluating visual performance across different defocus levels. ### What are the basic features of Multifocal Lens Analyzer? The free version includes Visual Acuity Defocus Curves, the ability to select two distances (2m and 4m), a defocus lens range from +5.00 D to -5.00 D, and Snellen optotypes. ### What functionalities does the PRO version of Multifocal Lens Analyzer offer? The PRO version adds Contrast Sensitivity Defocus Curves, +/- 0.25D steps, Sloan Optotypes, auto-calculation of Sphere, remote control, a historical database, data export to .CSV, and area under the curve calculation. ### How does Multifocal Lens Analyzer work on iPhone vs. iPad? An iPad is required for conducting the Defocus Curve measurement. An iPhone can be used as a remote control for the measurement process on an iPad. ### What is the cost of the PRO subscription for Multifocal Lens Analyzer? The PRO subscription costs $45.99 per year and provides access to all advanced features. Prices may vary by country. ### How can I manage my PRO subscription for Multifocal Lens Analyzer? Subscriptions can be managed by the user through their Account Settings after purchase. Auto-renewal can be turned off at least 24 hours before the end of the current subscription period. ### Is Multifocal Lens Analyzer suitable for all vision professionals? Yes, this is a professional app designed for professionals in vision sciences. It is based on evidence and intended for clinical practice and research. ### Where can I find more information or support for Multifocal Lens Analyzer? You can find research validation papers and authors who have used the app on www.defocuscurve.com. The website also provides terms and privacy policy information. ## Version history (last 5 releases) ### 3.0.10 — 2026-09-02 Introduce a Safe Mode access ### 3.0.9 — 2026-08-31 Solving Suscription problem and Notification of support end for replacement by other App. ### 3.0.8 — 2023-02-26 Added compatibility for iPads launched up to end 2022 ### 3.0.7 — 2022-01-12 Internal changes that do not affect to previous app performance ### 3.0.6 — 2021-10-21 Added support to iPad 9th Generation (2021) ## More apps by Qvision, Departamento de Oftalmología - [AmblyopiaVA](https://appshunter.io/ios/app/amblyopiava/id579600751) - [ClinicCSF Contrast Sensitivity](https://appshunter.io/ios/app/cliniccsf-contrast-sensitivity/id579919783) - [StereoTAB Stereopsis Testing](https://appshunter.io/ios/app/stereotab-stereopsis-testing/id583288600) - [CalibratorVS](https://appshunter.io/ios/app/calibratorvs/id936244772) - [VisionC (ETDRS Visual Acuity)](https://appshunter.io/ios/app/visionc-etdrs-visual-acuity/id1041393885) All apps by Qvision, Departamento de Oftalmología: https://appshunter.io/developer/1602553646 ## Related topics [tamron lens utility mobile](https://appshunter.io/ios/topics/tamron-lens-utility-mobile) --- *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 2026-09-07.*