This Near Vision Testing Unit Fixation Disparity combines a comprehensive range of tests for refraction and ocular motor investigations at near.
The unit from Evans Instruments 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.
The tests incorporated in the Near Vision Disparity 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
This Near Vision Disparity Unit combines a wide range of tests for refraction and ocular motor investigations at near. The unit is supplied with polarisation set at 90/180 degrees or 45/135 degrees and a corresponding visor can be supplied if required. An optional bracket can be supplied allowing the unit to fit onto a Refractor Head reading arm. The unit is rechargeable and incorporates the following tests:
Fixation Disparity Test. Polarised Foveal Suppression Test. Polarised Bichromic Test. Test for Arc & Suppression in Strabismus.
Stereopsis Test. Tangent Scale & Spot. V.A. Charts. Dominant Eye Accommodation.
Measurement of Monocular Amplitude of Accommodation under Binocular conditions. Polarised X-Cyl Target & VA Balance Test.
N5 – N12 Reading Fonts – individually highlighted. Near Point Convergence. Convergence Relationship Test.
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