Snellen Chart

João Meneses

About this app

This mHealth application intent is to provide and empower mobile regular users and health professionals with the tool with which they can estimate their or others visual acuity, based on a classical Snellen Chart Test. This App is innovative because it transforms an old style poster test design in a new, modern, intuitive, ubiquitous test. One App with a simple user interface, and an intuitive navigation chart using swipe gestures to navigate from optotype to optotype, and with the capability to adapt the Snellen Chart Test to different screen sizes, screen resolutions and user distances.

Ratings and reviews

Thank you. Outstanding app. Love the way it takes into account the screen size and pixel resolution, in addition to distance from the eyes. All adjustable in settings. You're a genius! The performance is actually much better that the charts in my eye doctor's office. Which is projected onto a screen, then reflected in a mirror. Each step of the way resolution is lost! Your app is so much better. Thank you for helping so many people with this app! God Bless you! Please add plain font option!

When I try to set the distance to 1 feet it automatically rolls back to 19 feet. I finally found there should be an OK button on the lower right corner I cannot see on my screen but it is there. And when I press in that place even though there's nothing there, the 1 feet distance stays in place. I don't know why I cannot see this phantom OK button, maybe its the dark mode?

Use to work fantastically. Now I can't switch to Metric system, user interface became less user friendly, colour choice in menu makes everything unclear when making choices. App worked fine before, now it's a massive pain to use. Going to have to search for another Snellen Chart app.

What's new

Removed Android status bar and bottom navigation while using the App. Fixed optotype line left/right swipe behavior. Minor bugs fixed.