Sight Testing and Refraction

Vision Screening | Evans LED Near Vision Unit

Evans LED Near Vision Unit

This Near Vision Disparity Unit combines a comprehensive range of tests for refraction and ocular motor investigations at near. The unit is supplied with polarisation set at 90 degrees x 180 degrees. The unit is rechargeable, incorporating the latest charging circuitry and is recharged via a plug-in power supply. The new casing has a much smaller footprint to previous models, standing upright on the desktop. A retractable measuring tape is incorporated within the unit.

Evans LED Near Vision Unit

The tests incorporated in the unit are as follows:

  • Fixation disparity test
  • Polarised foveal suppression test
  • Polarised test for arc & suppression in strabismus
  • Polarised bichromatic test
  • Polarised cross-cylinder target & visual acuity balance test
  • Measurement of the monocular amplitude of accommodation under binocular conditions
  • Stereopsis test
  • Tangent scale & spotlight
  • N5-N12 Times reading fonts
  • Dominant-eye & accommodation convergence relationship test
  • Visual acuity charts (both letter & E) in decimal notation
  • Near point convergence