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Fig 3
Using the Vantage
Mirror Height Control (K)
The Keeler Vantage offers the unique facility to raise and
lower the height (not just the angle) of the illumination
mirror, independently of the viewing optics, for optimum
binocular viewing through small pupils and when viewing
the peripheral retina (Fig 1).
For maximum stereopsis with larger pupils, keep the mirror
in the upper position, creating a steeper angle between
the viewing axis and the illumination axis, whilst minimising
reflections.
To view through undilated pupils, lower the height of the
mirror, then adjust the mirror angle, which will align the
axis of illumination more closely with the viewing axis. If
full lens illumination still proves difficult, selecting the
Diffuser may offer the best opportunity to illuminate the
widest fundal area possible.
For optimal stereopsis when examining the peripheral
retina (which means viewing through a elliptical pupil),
with the Keeler Vantage, the mirror height may be lowered,
and the mirror angle adjusted, bringing the illumination
more coaxial to the viewing axis whilst providing the best
opportunity for stereopsis.
Optics Convergence Lever (L)
The lever in the right hand position (Fig 2) allows the
mirrors to be separated achieving improved stereopsis in
a dilated eye. By moving the lever either partially or
completely to the left (Fig 3) the optics are converged to
view through a small pupil.
Fig 2
Fig 1
