Nidek RT900 Auto Phoropter Head
The Nidek Refractor model RT-900 is a computerized refractor used for subjective refraction when connected to the Nidek Auto Refractometer (AR), Auto Ref/ Keratometer (ARK) and Auto Lensmeter (LM)*. The operator has a fully integrated refraction system that simplifies and speeds up refraction.
The RT-900 includes a refractor head, a remote control, a relay box, and a printer (option).
The relay box serves as a link to the refractor head, remote control and printer, and also functions as a communication link to the AR and/or LM.
The refractor head provides a display for viewing measurements. The remote control allows the operator to perform most operations from the integrated console by linking the refractor and the connected chart presenting device.
Specifications:
Measuring range
- Sphere: –19.00 to +16.75 D, (0.25 D/ 3 D increments)
- Cylinder: 0.00 to ±7.25 D (0.25 D/1 D increments)
- Axis: 0 to 179 degrees (1 /5 degrees increments)
- PD: 48 to 80 mm
(Short working distance:
Both - 1.0 mm/ Single - 0.5 mm increments)
50 to 74mm
(Far PD:
Both - 1.0 mm/ Single - 0.5 mm increments)
50 to 74mm
(Near PD when the near working distance is set in 35 cm: Both - 1.0 mm/ Single - 0.5 mm increments)
54 to 80 mm: 100% convergence far PD
(The convergence angle is reduced gradually under 54 mm and
becomes 0% (no convergence) at 48 mm.) - Rotary prism lens: 0 to 20∆ (0.1∆/ 0.5∆/ 2∆ increments)
- Cross cylinder lens: ±0.25 D cross cylinder lens
Refraction distance for near vision: 350 to 700 mm (50 mm increments)
Visual field: 45 degrees (VD=12 mm), 44 degrees (VD=13.75 mm)
Adjustment range of the forehead rest: 15 mm
Scale of corneal vertex distance: 12, 14 (13.75 in certain areas), 16, 18, 20 mm
Adjustment of horizontal level: ±2.5 degrees
* Please check for model compatibility.
