What are the limits of the EyeQue Person Vision Tracker?

The EyeQue Personal Vision Tracker is able to measure refractive error in the following ranges:

Spherical measurement of +8.00D to –10.00D.

Cylindrical measurement of 0.00 to –4.00D.

Axis measurement from 1 to 180 in 1-degree increments.

If you typically have correction measurements outside of these ranges, you may not be able to measure your refractive error accurately. You will likely experience a warning while testing indicating that the range limit has been reached. Contact [e-mail] for assistance.