Kowa VX-20, Instruction Manual, Page: 36 / 88

20
3 Basic usage
4
Adjust the flash intensity.
The flash intensity is automatically set according to the photography
mode. If it is necessary to adjust flash intensity, you may do so with
the flash intensity compensation knob.
5
Select a field angle.
Press the “field angle selection button” to select a field angle.
6
Compensate diopter.
As needed, press the “diopter compensation buttons” on the right side
panel and use the diopter compensation lens.
The diopter range of each button is shown below.
+ : +10 to +35D
0 : ─ 12 to +13D
─ : ─ 32 to ─ 10D
7
Pull the main unit towards you as far as it goes, and move the optical
head base horizontally and/or the optical component vertically so that
the patient's eye is displayed in the center of the LCD monitor.
8
Adjust the working length.
Move the optical head base forward until the patient's pupil and the
ring illumination coincide. (Coarse motion)
Adjust the position of the main unit so that the working dot shown on
the retinal image becomes the brightest over the working dot aid. (Fine
motion)
Notice
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Maintain a sufficient distance to avoid hitting the patient while moving the instrument in a coarse mo-
tion.