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The Snellen chart is a widely used tool for measuring visual acuity. Named after the Dutch ophthalmologist Herman Snellen, who created it in 1862, this chart helps assess eyesight. To get started, choose a vertical surface to display the chart, stand 6 meters away, and aim your device’s rear camera at the surface. Once the chart loads, you can adjust its position and size via the control panel or directly on the screen using drag-and-drop, rotate with two fingers, or zoom in/out gestures. Need to switch surfaces? Just tap the button with the two circular arrows. You can also mute the sound or hide help texts using the appropriate buttons.

A Snellen chart is an eye chart that can be used to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Herman Snellen, who developed the chart in 1862. Select a vertical surface you want to pin the chart on, step 6 meters away from it, direct the rear camera towards the surface and start the program. After the chart is loaded, you can change its position and size using the control panel or right on the screen with the help of drag-and-drop, rotation (with two fingers) or zooming in/out (with two fingers) gestures. If you want to change the vertical surface, tap the button with two round arrows. You can disable help texts or sound using the corresponding buttons.

A Snellen chart is an eye chart that can be used to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Herman Snellen, who developed the chart in 1862. Select a vertical surface you want to pin the chart on, step 6 meters away from it, direct the rear camera towards the surface and start the program. After the chart is loaded, you can change its position and size using the control panel or right on the screen with the help of drag-and-drop, rotation (with two fingers) or zooming in/out (with two fingers) gestures. If you want to change the vertical surface, tap the button with two round arrows. You can disable help texts or sound using the corresponding buttons.

A Snellen chart is an eye chart that can be used to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Herman Snellen, who developed the chart in 1862. Select a vertical surface you want to pin the chart on, step 6 meters away from it, direct the rear camera towards the surface and start the program. After the chart is loaded, you can change its position and size using the control panel or right on the screen with the help of drag-and-drop, rotation (with two fingers) or zooming in/out (with two fingers) gestures. If you want to change the vertical surface, tap the button with two round arrows. You can disable help texts or sound using the corresponding buttons.

A Snellen chart is an eye chart that can be used to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Herman Snellen, who developed the chart in 1862. Select a vertical surface you want to pin the chart on, step 6 meters away from it, direct the rear camera towards the surface and start the program. After the chart is loaded, you can change its position and size using the control panel or right on the screen with the help of drag-and-drop, rotation (with two fingers) or zooming in/out (with two fingers) gestures. If you want to change the vertical surface, tap the button with two round arrows. You can disable help texts or sound using the corresponding buttons.

A Snellen chart is an eye chart that can be used to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Herman Snellen, who developed the chart in 1862. Select a vertical surface you want to pin the chart on, step 6 meters away from it, direct the rear camera towards the surface and start the program. After the chart is loaded, you can change its position and size using the control panel or right on the screen with the help of drag-and-drop, rotation (with two fingers) or zooming in/out (with two fingers) gestures. If you want to change the vertical surface, tap the button with two round arrows. You can disable help texts or sound using the corresponding buttons.