Kowa VX-20, Instruction Manual, Page: 49 / 88

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4 Other functions
4.3 LCD Monitoring
This section describes how to perform alignment on the LCD monitor without using the optical viewfinder
(eyepiece) during mydriatic color photography, Red Free photography, fluorescence angiography, and mydri-
atic monitoring in FAF.
This function eliminates the need of diopter adjustment of the optical viewfinder (eyepiece).
Also, this mode uses infrared rays instead of visible light to observe patients; therefore, patients are relieved
of glaring, which facilitate smooth photography.
Pressing the “LCD monitoring button” on the right side panel switches
to the LCD monitoring mode.
Pressing the “LCD monitoring button” once again switches back to the
viewfinder monitoring mode.
Point
;
When the patient's pupil in natural dialation is 5.5 mm or more in diameter, mydriatic color observation
allows you to photograph with field angle of 50 degrees without using mydriatics .
The field angle for the standard non-mydriatic color photography is 47 degrees.
Important
◇ Images on the LCD monitor are not as clear as the ones in the viewfinder monitoring mode; therefore,
it becomes more difficult to remove a flare or adjust focus.
◇ Notice that when performing LCD monitoring in the FA mode, not only a fluorescence image but also
an actual captured image with infrared rays; therefore, the photographed fluorescence image differs
from the image seen while performing alignment.
Point
;
The LCD monitor angle may be changed. Adjust the angle if the LCD monitor is hard to see during the
viewfinder observation or while the optical head is tilted.