The Near Vision Disparity Unit combines a comprehensive range of tests for refraction and ocular motor investigations.

 

The unit can be supplied with polarisation set at 90 degrees x 180 degrees (for UK market) or 45 degrees x 135 degrees (for export or use with a refractor head). Please specify which option you require when ordering. 

 

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, and a retractable measuring tape is incorporated.

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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 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