--- title: "VisionC (ETDRS Visual Acuity) - Reviews, Revenue and Downloads in Switzerland | Apple App Store" description: "VisionC is the first ETDRS chart completely configurable to be presented at any distance from 20 cm to 400 cm (1 cm step) and for any Contrast from 0 to 100% (1% step). It is the only one that allows " --- # VisionC (ETDRS Visual Acuity) — Switzerland > High and Low Contrast Chart ![VisionC (ETDRS Visual Acuity) App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/61/df/bf/61dfbf8c-e8d1-9af9-0500-f4a02eb174ca/AppIcon-0-0-1x_U007emarketing-0-8-0-0-85-220.png/434x0w.png) **Developer:** [INDALOFTAL SL](https://apptail.io/developer/indaloftal-sl-Jwe) **Category:** Medical **Rating:** N/A (0 ratings) **Price:** CHF 70.00 **Bundle ID:** com.formacionoptometrica.VisionC **Store:** Apple App Store **Country:** Switzerland **Version:** 2.1.3 (released 2025-07-09) **Original Release:** 2015-10-13 **Languages:** English **App Store Link:** [Download on Apple App Store](https://apps.apple.com/ch/app/app/id1041393885) **AppTail Page:** [https://apptail.io/app/visionc-etdrs-visual-acuity-cgNm/switzerland](https://apptail.io/app/visionc-etdrs-visual-acuity-cgNm/switzerland) ## VisionC (ETDRS Visual Acuity) Description VisionC is the first ETDRS chart completely configurable to be presented at any distance from 20 cm to 400 cm (1 cm step) and for any Contrast from 0 to 100% (1% step). It is the only one that allows you to control de luminance of the background and the optotype with a low-cost external luminance meter. You can use PicoDisplay App and Pico (Palette) device for this purpose. The visual acuity with the ETDRS is usually measured at three distances (far, intermediate and near) but research studies sometimes differ in the specific distance for each one of the categories. With VisionC you can select the specific distance for each one of these three configurations in such a way you can rapidly access to the specific distance you desire. The App comes with a different set of letters in order to avoid memorization. Therefore either letters for distance, intermediate and near or right, left and both eyes differ to prevent memorization. You can join our community in order to ask any question or to receive support: www.facebook.com/groups/qvisionacademy/ ## VisionC (ETDRS Visual Acuity) Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/Purple114/v4/91/9f/cb/919fcb19-9aba-fe64-8a03-6f9c7790bea8/pr_source.png/2732x2048.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/Purple114/v4/68/62/86/6862866d-0da2-e9e3-e352-10752fd82a46/pr_source.png/2732x2048.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/Purple114/v4/ce/47/c8/ce47c885-3a5e-b166-19b8-9479db3c088f/pr_source.png/2732x2048.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/Purple114/v4/64/03/66/640366e9-a7a6-5bd2-e83b-955e4f83d7f0/pr_source.png/2732x2048.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/Purple124/v4/4c/bb/33/4cbb3316-087c-9a15-a6ae-a90b0f01d3a2/pr_source.png/2732x2048.png) - [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/Purple114/v4/bc/00/f9/bc00f928-a710-225c-9c4e-25e465072784/pr_source.png/2732x2048.png) - [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/Purple124/v4/20/18/16/201816ad-da4b-d806-ceb0-db547b2ba382/pr_source.png/2732x2048.png) - [Screenshot 8](https://is1-ssl.mzstatic.com/image/thumb/Purple114/v4/bf/49/ee/bf49eead-08fe-5922-d64f-da497e5a5481/pr_source.png/2732x2048.png) ## Apps Similar to VisionC (ETDRS Visual Acuity) - [The Pain Scale](https://apptail.io/app/the-pain-scale-eBdb/switzerland) - [K-D Color Contrast Sensitivity](https://apptail.io/app/k-d-color-contrast-sensitivity-edsb/switzerland) - [Optonet Vision Unit](https://apptail.io/app/optonet-vision-unit-KrMc/switzerland) - [Goniotrans](https://apptail.io/app/goniotrans-qgsd/switzerland) - [Eye Charts](https://apptail.io/app/eye-charts-gKae/switzerland) - [ZRefractive](https://apptail.io/app/zrefractive-Mwge/switzerland) - [FacoElche 2023](https://apptail.io/app/facoelche-2023-bMbh/switzerland) - [Dyop® Vision Test](https://apptail.io/app/dyop-vision-test-Jnbl/switzerland) - [MNREAD](https://apptail.io/app/mnread-cUxl/switzerland) - [OPTOM 2024](https://apptail.io/app/optom-2024-kRFp/switzerland) ## VisionC (ETDRS Visual Acuity) Available In - [Switzerland](https://apptail.io/app/visionc-etdrs-visual-acuity-cgNm/switzerland) - [China](https://apptail.io/app/visionc-etdrs-visual-acuity-cgNm/china) - [Spain](https://apptail.io/app/visionc-etdrs-visual-acuity-cgNm/spain) - [France](https://apptail.io/app/visionc-etdrs-visual-acuity-cgNm/france) - [India](https://apptail.io/app/visionc-etdrs-visual-acuity-cgNm/india) - [Kuwait](https://apptail.io/app/visionc-etdrs-visual-acuity-cgNm/kuwait) - [Malaysia](https://apptail.io/app/visionc-etdrs-visual-acuity-cgNm/malaysia) - [Norway](https://apptail.io/app/visionc-etdrs-visual-acuity-cgNm/norway) - [New Zealand](https://apptail.io/app/visionc-etdrs-visual-acuity-cgNm/new-zealand) - [United States](https://apptail.io/app/visionc-etdrs-visual-acuity-cgNm/united-states) - [South Africa](https://apptail.io/app/visionc-etdrs-visual-acuity-cgNm/south-africa) --- ## About AppTail [AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. 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