ADC Diagnostix Otoscope PMV Series Instruction Manual page 11

Coax Ophthalmoscope:
Semi-circle, small/medium/large circular aperture, fixation star and slit.
Coax Plus Ophthalmoscope:
Semi-circle, small/medium/large circular aperture, fixation star, slit and grid.
Aperture
Half Moon
Micro Spot
Small Circle
Large Circle
Karo (Grid)
Slit
Fixation star
7.4. Changing Filters
Using the filter wheel, the following filters can be switched for each aperture.
Coax & Coax Plus Ophthalmoscope:
Red-free filter, blue filter, and polarisation filter.
Filter
Red-free filter:
Polarisation filter:
For examinations with turbid lenses
Allows quick entry into small, undilated pupils
Excellent view of fundus through an undilated pupil Coax/Coax Plus
For a dilated pupil and general examination
For topographic determination of retina changes
To help determine levels of tumors and lesions Coax/Coax Plus
Measuring eccentric fixation or locating lesions Coax/Coax Plus
Function
Contrast enhancing to assess fine
vascular changes, e.g. retinal bleeding.
For precise assessment of tissue colors
and to minimize retinal reflections.
Function
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Model(s)
Coax/Coax Plus
Coax/Coax Plus
Coax/Coax Plus
Coax Plus Only