Scare your friends with application stimulates eye test - for free!
Impress your friends.
Tips:
- Set the volume in your smartphone to the max
- The effect will be better if the test will take place in a quiet, preferably as a dark place
- It is recommended that the maximum brightness of the screen
- Watch your smartphone - friend can drop it in a panic
- Note on the elderly, sickly or the faint of heart