Near Vision Unit 
                     (product code: NVU)
                
              
                - Sometimes called Mallett unit
 
                - Rechargeable, and comes with plug-in
                    Adapter
 
                - Able to stand upright on desktop
 
                - Retractable measuring tape built into
                    the unit
 
                - Tests include: fixation disparity,
                    foveal suppression, binocular balance, NPC,
                    stereopsis
 
                - Polarised test for arc & suppression
                    in strabismus
 
                - Polarised bichromatic test
 
                - Measurement of monocular amplitude of
                    accommodation under binocular conditions
 
                - Tangent scale & spotlight, N5-N12
                    Times reading fonts
 
                - Dominant-eye & accommodation
                    convergence relationship test
 
                - Visual acuity charts (both letter &
                    E) in decimal notation
 
                - Unit is supplied with polarisation set
                    at 90/180 (most common in the UK)
 
                - Made in the UK
 
               
              
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