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English
Aperture Selection Control (H)
By rotating the knob (H) different apertures
may be selected
The Keeler Vantage has 4 light apertures which offer maximum
versatility when encountering a variety of pupil sizes, opacities
and c
ondit
ions:
Large
The large, round, homogeneous patch is suitable for routine examinations through
fully dilated pupils.
Medium
The intermediate patch is designed to reduce reflections when entering a partially
or poorly dilated pupil (3mm). It is also ideal for closer inspection of particular fundal
areas.
Small
This light patch is ideal for small, undilated pupils and may be used in conjunction
with the Optics Convergence Lever set to the small pupil setting
(see page 106).
Diffuser
This unique extra wide beam of diffused light permits a more relaxed technique
during more challenging fundus examinations; the peripheral retina, poorly dilated
eyes and uncooperative patients. Beginners may also find this aperture particularly
helpful since the alignment between the headset, the condensing lens and the
pupil, in order to achieve a full lens image, is not as critical as with the conventional
beam.
Using the Vantage
Setting the Aperture and Filter
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