Welch Allyn 118 Series PanOptic Ophthalmoscope - User Manual - Manual (Page 13)

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10. Slowly follow the red reflex toward
the patient and into the pupil. Get
as close as possible for the
optimum view (the eyecup should
contact the patient’s brow).
11. Once you have a stable view of the
fundus rotate the focusing wheel
until you have a crisp view of the
optic disc and the vessels
surrounding it.
Note: For the largest view, compress
the eyecup halfway against the
patient’s brow. This enables
the user to view the entire
optic disc plus many
surrounding vessels (about 25°
field of view) at one time.