The testing range available with the VT-10 is extraordinary, the standard cylinder power range extends to 6,000 in 0.25D increments. In addition, auxiliary lens sets are incorporated to fine-tune cylinder power measurements to 0.12D increments or extend cylinder power range to 8,000. Accurate prism reading even below 0.5△ are possible thanks to the 20△range (1△increments) of the precisiongeared rotary prism loupes. The VT-10 is also available in plus or minus cylinder models. This model is minus. See related products for plus cylinder product information.
The most significant time-saving feature of the VT-10 is its synchronization of crosscylinder loupe rotation to cylinder axis adjustment. Special gearing automatically synchronizes the rotation of the loupe each time you change cylinder axis correction. The result? You simply read a single scale, one time, after completing a full series of axis checks. The biloupe turret lets you index power or axis loupes with a single touch.
Control of cylinder axis and power testing is amazingly simple; concentric control knobs within a double-calibration axis scale make adjustment a quick, one hand action through the full 360°range. The axis scale reads in 5° increments, with 15°markings. An additional axis scale is located at the main aperture, for convenient reference during retinoscopy. The low position of the control knobs keeps the operators hands out of the line of vision.
Convenient dual controls make it easy for the operator to adjust interpupillary distance, in a range from 48mm to 75mm. The mechanism is sealed for protection and smooth functioning. An easy-to-read scale provides 1mm graduations, and a vergence adjustment controls reductions in P. during near testing.
The TOPCON VT-10 comes with a full complement of versatile auxiliary lenses -10 different lenses plus two open apertures, any of which can be indexed into position with one-touch speed and convenience. A red lens/green lens shift, for example, is immediately available for binocular vision testing. The auxiliary lens plate has a flat black finish to prevent stray reflections during use.
TOPCON VT-10 incorporates a single-dial power control that lets the operator quickly dial in any spherical power from +16.75D through 0 to -19.00D, in 0.25D increments. To make settings faster, a strong sphere control allows adjustment in 3.00D steps; the auxiliary lens knob provides for finetuning in 0.12D increments for absolute accuracy.