Working distance
The working distance is variable from 300-600mm
from the front of the patient’s eye to the front of
the instrument with a 20D lens.
If the image on the screen is out of focus you
need to move the optics forwards and or
backwards until it becomes in focus.
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Adjust the focus lens
Adjust the focus of the lens by rotating the focus
adjusting lever.
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Retinal image out of focus
Retinal image in focus
Adjust the camera patch
Adjust the camera patch on the screen by rotating
the spindle.
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Too high on
the screen
Too low on
the screen
Central on
the screen
Contact information
Manufactured in the UK by:
Keeler Limited
Clewer Hill Road
Windsor
Berkshire SL4 4AA
England
Freephone: 0800 521 251
Tel: +44 (0)1753 857177
Fax: +44 (0)1753 827145
Distributed by:
Keeler Instruments Inc.
456 Parkway
Broomall
PA 19008,
USA
Toll Free: 1 800 523 5620
Tel: 610 353 4350
Fax: 610 353 7814
EP59-09863 – Issue D
Correct positioning
Position the binocular indirect ophthalmoscope on your
head and adjust as you would normally, positioning the
light patch as you would during a normal examination.
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