... 3.Wide testing range;Multi-coated lense The VT-1 Vision Tester provides exceptional quality and value, featuring quick, easy and ... Inner 40Outer 40 (50 )Upward and downward 40 (60 ) Near vision test Main optical axes of both lenses converges by means ... eyes at 64mm P.D. If P.D. for far vision is less than 54mm, converging operation stops. Binocular balanceTest Rotary ...