The Evans’ Near Vision Disparity Unit combines a comprehensive range of tests for refraction and ocular motor investigations at near, incorporating the latest LED illumination technology. The unit is supplied with polarisation set at either 90 x 180 degrees (for UK market) or 45 x 135 degrees (for export, or use with a refractor head). The unit is rechargeable, incorporating the latest charging circuitry and is recharged via a plug-in power supply. The new casing is much lighter than previous models and is easy to hold, especially for the young and elderly. A retractable measuring tape is incorporated within the unit and a wide range of languages is available.
The tests included in the unit: