Main goal of this app is to allow medical doctors to show their patients how glaucoma could change their vision.
Glaucoma is a group of eye conditions that damage the optic nerve. The optic nerve sends visual information from your eye to your brain and is vital for good vision. Damage to the optic nerve is often related to high pressure in your eye. But glaucoma can happen even with normal eye pressure.
App is not showing exact change that happens to patients, it shows roughly what could happen to patients in general, as a simulation.
If you are having problems with your vision be sure to contact your doctor, or directly contact an ophtalmologist.