The 3nethra aberro is a handheld autorefractometer equipped with the Shack-Hartmann wavefront sensor aberrometry technology to detect visual acuity and refractive errors [spherical, cylinder, and axis] that help clinicians prescribe eyewear.
Also, single-vision and bi-focus lens refraction measurements can be recorded in just a few seconds. This device is not only small and insensitive to vibration, but can also precisely measure higher and lower order wavefront abberrations.
The 3nethra Aberro does not require periodic calibration (due to the absence of any moving parts in the opto-mechanics) and is ideal for screening programs due to its portable and handheld feature.
Other higher-order aberrations