Nipple-cone GP (Soper, McGuire, McGuire nipple)
Multiple labs
Manufacturer / labMultiple labs
Product / familySmall-cone GP
DesignSteep, small-diameter multicurve corneal GP for focal apical cones
Corrects / indicated forFocal / nipple keratoconus with a steep apex and near-normal periphery
MaterialBoston EO / XO
Dk58 ×10⁻¹¹ (material)
Overall diameter7.5-8.8 mm
Optic zonesmall
Centre thickness~0.12 mm
Power range±25.00
Wear scheduledaily wear
ReplacementEvery 1-2 years
Fitting approachVery steep base curves; watch for excessive apical bearing (scarring risk) and inferior decentration.
Largely superseded by Rose K2 and intralimbal designs but still ordered by some labs for classic nipple cones.
Verify parameters against current manufacturer documentation before fitting.