Rodenstock Phoromat 2000, Operation Manual

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Phoromat 2000 Operation Manual
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NOTE
In this spherical refinement, circle of least confusion is maintained on the retina for
the next cylindrical axis measurement with the cross cylinder. When the patient can
not see the red and green sides equally, make the green side sharper slightly.
11. Measure the cylindrical axis.
1) Press .
The dots chart is presented.
A cross cylinder lens is placed. The cross cylinder lens type is switched between [Auto],
[±0.25], and [±0.50].
When the cylindrical power is 0.00 in the cylindrical power measurement, Steps 11 and 12
are skipped.
2) Measure the cylindrical axis with the cross cylinder lens.
Flipped cross cylinder :
Ask the patient which is sharper, chart 1
presented by pressing or chart 2 presented
by pressing .
when chart 1 is sharper.

Turn the dial counterclockwise by
increments of one.
(Also possible by pressing )
when chart 2 is sharper.

Turn the dial clockwise by increments of one. (Also possible by pressing )
Repeat the above until the both charts appear equal.
Auto cross cylinder:
Charts 1 and 2 are presented simultaneously.
Both chart positions appear in the lower left corner of the screen.
when chart 1 is sharper.

Turn the dial counterclockwise by increments
of one. (Also possible by pressing )
when chart 2 is sharper.

Turn the dial clockwise by increments of one.
(Also possible by pressing )
Repeat the above until the both charts appear
equal.
12. Measure the cylindrical power.
1) Press
The cross cylinder lens axis changes.
2)
Measure the cylindrical power with the cross
cylinder lens.
Follow the same procedure as 2) of Step 11.