Ametek Reichert Phoroptor VRx User Manual page 53

Instructions for Use
Aligning the Phoroptor Head
Pupillary Distance
The next adjustment is the Pupillary Distance (PD). Using the Controller, adjust the pupillary distance
between the right and left apertures on the Phoroptor Head. You can adjust the PD either monocularly
or binocularly. Binocular adjustment is the default.
Note: If the Auto Refractor or Lensmeter data transmits PD measurements when the data is brought
in as a starting point for the refraction, the Phoroptor Head automatically moves to adjust to that
PD.
Perform the following steps to adjust the PD:
1. Press the PD button, or touch PD at the top of the screen. Both apertures display Fixed Cross
Cylinder lenses.
2. Use the crosses in the lenses to center of the patient's pupils in each aperture. The default
adjustment is binocular.
Note: The Illumination for the Corneal Sights lights up to help with alignment.
3. Turn the CONTROL KNOB to the right to increase the pupil distance and to the left to decrease
pupil distance.
Binocular Adjustment
Turn the CONTROL KNOB to the right or left to increase or decrease PD in 1 mm increments.
Monocular Adjustment
Press the R or L button, or touch R or L on the screen to adjust PD for the right or left eye. Turning the
CONTROL KNOB adjusts PD in 0.5 mm increments.
Corneal Vertex Distance
The next adjustment is the Corneal Vertex Distance to ensure that the Refractor's lenses are at the
proper distance from the patient's eyes.
Note: The default vertex distance is 16 mm.
Perform the following steps to measure the Corneal Vertex Distance:
1. Look into the Corneal Vertex Distance Windows and line up the corneas by turning the forehead
rest knob, so the target line and the target mark superimpose. (Please refer to Figure IU-05.)
Close Up
16241-101 Rev. D
(continued)
(continued)
Figure IU-05, Corneal Sights
Corneal Sights
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