The following content are based on the feedback from Apple App Store and Google Play as well as other channels.
Q: I see bed side patients and most of them are low vision patients. The VA chart app I used to use is no longer supported so I downloaded this app. This app is great because it allows me to test with numbers (most dementia patients cannot read letters but they can still read numbers) l Wish this app had 20/400 and beyond. Could you add larger optotypes?
A: If John the patient cannot see 20/200, isn't he already legally blind. Nevertheless, you can still test 20/400. For example, change the app's test distance to 10 feet, but actually test at 20 feet with an optotype of 20/200, the largest the app can display.
Q: My toddler doesn’t know his letters yet but he does know his shapes.
A: This eyechart app was designed for children older than 6 as described in the app description since day 1. Checking eyesight of preschool children generally requires a paediatrician and a special set of optometry devices. And the app since v2.9 provides a Shapes chart, however, this is still good only for children older than 6.
Q: I rarely use metric. It would be great if I were able to switch units to English.
A: If you mean imperial units / British Imperial for feet, you may just go to Settings and switch. And since version 2.9, the app will use imperial unit by default if the locale of your device is with USA.
Q: I need the ability to turn off vibration, set any letter size, display several letters/words at once.
A: Vibration is a kind of feedback for successful wipes, when voice hint is off. In v2.8, multiple optotypes in one row (3-5) is supported.
Q: Can you provide LEA test symbols like those circle and apple shapes?
A: LEA test is for pediatric vision tests while this eyechart app is designed for children older than 6 since the first release. Nevertheless, for people who can't read letter or numbers, the Shapes chart could be useful.