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Tomovethroughtherangeonthenegative
(–)side:
Rotatelensselectiondialinnegative(counter-
clockwise)direction.At–9dioptersmove
lensdialcounterclockwiseagain.Thenmove
multiplierleverto“–”position.Continue
movinglensdialinsamecounterclockwise
directiontoaccess–10to–25diopters.
Rubber
browrest
Lens
multiplier
Lens
selection
dial
Diopter
display
window
PractitionerSide
PatientSide
9
Filter
Red-Free
Filterposition
Open
spot
position
Two-position
Filterswitch
Aperture
selection
dial