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AssigneeJohnson & Johnson Vision Products, Inc.
InventorsJeffrey H. Roffman, Edgar V. Menezes, Yulin X. Lewis, Timothy R. Poling, Michel Guillon
Estimating the term…
A design family of contact lenses includes a central area utilized for distance vision, surrounded by multiple alternating annuli of near and distance optical powers, surrounded by a peripheral distance zone. The design can also be used in intraocular lenses (IOL). The distance optical power is constant across the design family of lenses, but the near optical power increases as a subject's presbyopia increases. The design family of contact lenses can be fitted to a patient in a standard fashion by fitting both eyes to the best distance visual acuity (VA), and obtaining near acuity from the near annuli. A modified monovision method fits the patient's dominant eye with a contact lens as described having the full prescription distance power and fitting the nondominant eye with a contact lens as described having a distance optical power between the full prescription distance optical power and the near optical power. Specifically, the nondominant eye is fitted with a contact lens as described but having a distance power between 50% and 100% of the range between the prescription near and distance optical powers, biased towards the distance optical power.
A method of fitting a presbyopic patient, having a prescription distance optical power and near optical power, with a design family of contact lenses which includes a central area for distance vision, surrounded by multiple alternating annuli of near and distance optical powers, surrounded by a peripheral distance optical power zone comprising:
A method of fitting a presbyopic patient, having a prescription distance optical power and near optical power, with a design family of contact lenses which includes both a first refractive optical power and a second refractive optical power, one of said refractive optical powers being for distance vision and the other of said refractive optical powers being for near vision said lens containing an optical surface with a central portion having said first optical power focusing substantially all the incident light at the first optical power, a first annular portion exterior said central portion containing more second optical power area than first optical power area in the central and first annular portions combined, and a second annular portion exterior said first annular portion containing sufficient first optical power area such that the total first optical power area in the central, first annular and second annular portions combined is greater than the total second optical power area in the central, first annular and second annular portions combined, comprising
A method of fitting a presbyopic patient, comprising:
A pair of contact lenses for a patient wherein each lens comprises a first refractive optical power and a second refractive optical power, one of said refractive optical powers being for distance vision and the other of said refractive optical powers being for near vision, and wherein one of said lenses has the full prescription distance optical power, and the second of said lenses comprises a distance optical power which is intermediate the full prescription distance optical power and the near optical power.
Dependencies are inferred from the claim text.