Kowa VX-20, Инструкция по эксплуатации, Страница: 37 / 88

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3 Basic usage
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Guide the patient's fixation.
Use the external fixation target to guide the patient's visual fixation
until the part you want to photograph becomes visible through the op-
tical viewfinder (eyepiece).
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Position the external fixation target where the patient can fix the vi-
sion with the eye not examined.
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If the patient's fixation cannot be achieved with the eye not pho-
tographed, press the “LCD monitoring button”; then, select an
internal fixation target using the “fixation target selection button”,
or use the internal fixation target (optional accessory) to guide the
patient's fixation.
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Adjust the focus.
Turn the “focusing knob” to adjust the focus. When you turn the focus-
ing knob, the focus dots on the LCD monitor move left and right. Turn
focusing knob so that the upper and lower focus dots come to form a
straight line.
Notice
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The focus dots are not displayed when using the diopter compensation lens. Adjust the focus as you
view the retinal image on the LCD monitor.
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Start the timer.
Press the “Timer button” on the right side panel at the same time that
fluorescein is intravenously injected to the patient.
Elapsed time is indicated on the LCD monitor. The elapsed time at the
time of photography is also recorded in the photographed image.
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Insert the barrier filter.
Press the “Barrier filter button” on the right side panel and insert the
barrier filter into the light path.