PDR-7000 Operation Manual
2.3 Setting Prism
2.3.1 Switching between rectangular and polar
coordinates
Press [XY] or [rθ] on the screen.
This key toggles between rectangular (XY) and polar coordinates (rθ).
Example)
Right eye: 1.0ΔBI, 1.0ΔBU 1.40Δ, BASE 45°
Left eye: 2.0ΔBO, 1.5ΔBD 2.50Δ, BASE 323°
2.3.2 Rectangular coordinates (XY)
1. Press .
The rotary prism lenses are placed in the refractor head.
The prism powers are highlighted in the central screen.
2. Enter base in/out prism powers.
Turn the dial to change the prism powers (in increments of 0.5Δ).
Turn the dial clockwise. The powers increase to the BO (base out) side.
Turn the dial counterclockwise. The powers increase to the BI (base in) side.
3. Pres s
4. Enter base up/down prism powers.
Turn the dial to change the prism powers (in increments of 0.5Δ).
Turn the dial clockwise Left eye: The powers increase to the BD (base down) side.
Right eye: The powers increase to the BU (base up) side.
Turn the dial counterclockwise
Left eye: The powers increase to the BU (base up) side.
Right eye: The powers increase to the BD (base down) side.
It is also possible to change the prism powers in increments of 0.1Δ with or
instead of the dial.
Pressing either key changes the power continuously.
Turning the dial while pressing changes the power in increments of 2Δ.
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