init(sphere:cylinder:axis:addPower:vertexDistance:prism:farPupillaryDistance:nearPupillaryDistance:)

Declaration

init(sphere: HKQuantity, cylinder: HKQuantity?, axis: HKQuantity?, addPower: HKQuantity?, vertexDistance: HKQuantity?, prism: HKVisionPrism?, farPupillaryDistance: HKQuantity?, nearPupillaryDistance: HKQuantity?)

Parameters

• sphere:

  The correction for farsightedness, measured in Diopter() units. The range is -10.5 to +6.5.

• cylinder:

  Part of the correction for astigmatism. This property measures the strength of the correction in Diopter() units. The range is -3.0 to 3.0.

• axis:

  Part of the correction for astigmatism. This property measures the orientation of the correction in Degreeangle() units.

• addPower:

  The correction for nearsightedness, measured in Diopter() units. The range is from 0.25 to 2.5. The right and left eyes should have the same value.

• vertexDistance:

  The distance between the back of the lens and the eye, measured in mm. The range is 12 to 14 mm.

• prism:

  An object that contains information about the correction for eye alignment. For more information, see Hkvisionprism.

• farPupillaryDistance:

  The distance between the pupil and the center of the nose when looking at an object far away, measured in mm.

• nearPupillaryDistance:

  The distance between the pupil and the center of the nose when looking at a nearby object, measured in mm.