Great!

I tried this app despite other reviews and it works great! Very accurate and easy to use. Make sure you are in a well lit area to see whites and pupils of eyes, and make sure you are looking at lens with a "thousand yard stare". The reason the measurements for other users were off is because you have to use the straight lines to first measure the credit card width and then use the pupil measurement lines. Use it for the outside sales events we do.

Alishat33 about Pupil Meter