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Verfügbare Sprachen
Verfügbare Sprachen
You can now adjust the CLS system to your specific visual disorders (prescription)
(Please use the ray diagram on the last page)
When setting up the 579 CLS we would ask you not to ignore what your optician has told you, but by the
same token do not take it as written in stone.
1. Adjustment of the spherical defect
You can correct the "spherical" defect by adjustment of your magnifying diopter from +4,5 to -4,5 dpt.
Slowly turn knurled ring of the magnifying diopter until getting maximum target picture clarity.
The diopters of the cylindrical values can be adjusted with the help of the two levers of the
+ and – cylindrical lens. Start at the zero marking (levers are one upon the other) to turn both levers in
equal increments, one to the left and one to the right, until reaching necessary value.
2. Adjustment of cylindrical defect
There are two steps to set the basic adjustments of your Gehmann CLS (art. 579)
1. Adjustment of cylindrical axis:
a. Adjust the cylindrical value of the two levers at first roughly. You don't need to know the exact
cylindrical values, a rough adjustment will do. Precise value will follow with the adjustment using the
ray diagram (see last page). Relocate the two levers symmetrically (i.e. in equal steps), the raster will be
of great help to you. The cylindrical values are engraved on the CLS. Below picture shows the
adjustment of 1,0 dpt. as an example.
b. Loosen the locking collar of the complete system lightly now, in order to ensure comfortable
clockwise and anti-clockwise movement.
c. You can now have a trial look through the CLS at the ray diagram and turn it clockwise as well as
anticlockwise until achieving optimum sharpness.
d. Retighten the locking collar lightly.
2. Adjustment of cylindrical value:
a. Through symmetrical adjustment of the levers against each other you can now carry out fine
adjustment of the cylindrical value.
b. Examine the ray diagram through the CLS once again and adjust both levers slowly, in symmetrical
alignment (incrementing value) or divergent manner (value reduction).
You now have set the basic adjustments of your CLS.
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