Retinal observation light intensity
control knob
Right eye Left eye
Posterior Near center
Optic disc Left Right
Center of
macula
Center
Working dot
Retinal work-
ing dot posi-
tion aid
Focus dots
21
6.1.10 Adjusting observation light intensity
Adjust the image brightness by retinal observation light intensity control knob
when the retinal image, focus dots, and working dots are not clearly shown.
For details of LCD monitor brightness and contrast adjustment, refer to
“9.4.6
MONITOR BRIGHTNESS / CONTRAST”.
6.1.11 Guiding patient’s xation
The fixation target position changes when anterior segment observation is
switched to retinal observation. In order for the patient to stare at the selected
internal xation target, guide the patient’s xation to the internal xation target
by asking the patient to look at the green light.
Patients would recognize the xation target at the locations shown in the right
table depending on whether the right or left eye is examined and which xation
target position is selected.
6.1.12 Aligning
Move the optical head base slightly until the sizes of the two working dots become the smallest and the dots are aligned
on the top of the left and right retinal working dot position aids “
” in the LCD monitor as shown in the gure below.
The focus of the two working dots may be ne tuned by moving the control lever forward/backward.
6.1.13 Focusing
Turn focusing knob to have two focus dots “ ” on the display to form a single line.
6.1.14 Photography
After alignment and focusing are completed, photograph by pressing shutter button.
Pictures will be stored in the connected PC. For viewing and analyzing the pictures using a PC, refer to
“Installation
manual (ling software)”.
6 Operational procedure in photography
