Free
The blurb describes the app as a solution to reduce your visual fatigue and protect your eyesight because "myopia results from aesthenopia". I should have heeded my inner alarms that go off when apps unnecessarily use big words to describe perfectly simple things. Aesthenopia means eye strain.
The app is a series of eye exercises. You are instructed to hold your head still while following a red dot around a series of mazes on the screen. On an iPhone screen, this is not a challenge as your eyes need to move only a little to keep up.
You are supposed to do this for 10 minutes every two hours. Before realising the red dot's speed could be increased by tapping the "+" sign, I thought the greatest benefit of this app would be to put you to sleep within that time. The default speed is slow, and I found myself trying to push the red dot along faster with my eyes - a sort of telekinetic exercise. At high speed, your eyes begin to flicker in a way that would be alarming to an onlooker.