Abstract

We developed a portable, low-cost, accurate, wavefront sensing lensmeter for optometry applications: the Netrometer. The average absolute errors for sphere (SPH), cylinder (CYL) and axis of astigmatism (AXIS) on single vision glasses were, respectively: 0.058 ±0.118 diopters (m^-1), 0.076 ±0.152 diopters (m^-1) and 3.4 ±3.6 degrees (N=320). In addition to low-order measurements, the Netrometer produces in real-time a power map of the perceived refractive values. The design uses no moving parts and no additional refractive elements to the cellphone’s camera.

© 2015 Optical Society of America