Customized lens device and method

Patent metadata

Field	Value
Publication number	US-2016124245-A1
Application number	US-201414534106-A
Country	US
Kind code	A1
Filing date	Nov 5, 2014
Priority date	Nov 5, 2014
Publication date	May 5, 2016
Grant date	—

Abstract

A system and method for identifying a custom contact lens for a patient. The method includes receiving as input results from a bare eye examination of a patient including at least a measured sphere power; receiving as input a target or actual measured sphere power of a selected fitting lens; receiving as input results of an over-refraction examination of a patient wearing the fitting lens, wherein the results of the over-refraction examination include at least a measured sphere power; calculating the power delivered by the fitting lens on the patient's eye based on input received from the bare eye examination and over-refraction examinations; calculating an Effectiveness Ratio using the calculated power delivered by the fitting lens and the target or actual measured sphere power of the fitting lens; and calculating a custom lens power for the patient using the Effectiveness Ratio and measured sphere power from the bare eye examination.

First claim

What is claimed is:

1 . A method for identifying a custom contact lens for a patient, comprising:
receiving as input results from a bare eye examination of a patient including at least a measured sphere power; receiving as input a target or actual measured sphere power of a selected fitting lens; receiving as input results of an over-refraction examination of a patient wearing said fitting lens, wherein the results of the over-refraction examination include at least a measured sphere power; calculating the power delivered by the fitting lens on the patient's eye based on input received from the bare eye examination and over-refraction examinations; calculating an Effectiveness Ratio using the calculated power delivered by the fitting lens and the target or actual measured sphere power of the fitting lens; and calculating a custom lens power for said patient using the Effectiveness Ratio and measured sphere power from the bare eye examination.

2 . The method according to claim 1 , wherein the actual measured sphere power of the fitting lens is received as input, and wherein the Effectiveness Ratio is calculated using the actual measured sphere power.

3 . The method according to claim 1 , wherein the target lens power of the fitting lens is received as input, and wherein the Effectiveness Ratio is calculated using the target lens power.

4 . The method according to claim 1 , wherein the bare eye examination is a subjective examination.

5 . The method according to claim 4 , wherein the subjective examination is performed using a phoropter.

6 . The method according to claim 5 , wherein the phoropter has a resolution of at least 0.25D.

7 . The method according to claim 5 , wherein the phoropter has a resolution of at least 0.125D.

8 . The method according to claim 1 , wherein the bare eye examination is an objective examination.

9 . The method according to claim 8 , wherein the objective examination is performed using a refractometer.

10 . The method according to claim 8 , wherein the objective examination is performed using a device that measures the wavefront of the patient's eye.

11 . The method according to claim 1 , wherein the bare eye examination is a combination subjective and objective examination.

12 . The method according to claim 1 , further comprising the step of generating a custom contact lens prescription for said patient based on the calculated custom lens power.

13 . The method according to claim 12 , wherein the prescription is for a free form lens.

14 . The method according to claim 12 , wherein the prescription is for a commercially available lens having the closest lens power to the calculated custom lens power.

15 . A method for identifying a custom contact lens for a patient, comprising:
performing a bare eye examination on a patient to obtain at least a sphere power measurement for said patient's bare eye; selecting a fitting lens for said patient having a target or actual measured sphere power measurement selected based on the sphere measurement obtained from said bare eye examination; performing an over-refraction examination on said patient while said patient is wearing said selected fitting lens to obtain at least a measured sphere power; calculating a power delivered by the fitting lens on the patient's eye based on the results of the bare eye examination and over-refraction examination; calculating an Effectiveness Ratio using the calculated power delivered by the fitting lens and the target or actual sphere measurement of the selected fitting lens; and calculating a custom lens power for said patient using said Effectiveness Ratio and sphere measurement from the bare eye examination.

16 . The method according to claim 15 , wherein the selected fitting lens has an actual measured sphere power, and wherein the Effectiveness Ratio is calculated based on the actual measured sphere power.

17 . The method according to claim 15 , wherein the selected fitting lens has a target sphere power, and wherein the Effectiveness Ratio is calculated based on the measured sphere power.

18 . The method according to claim 15 , wherein the bare eye examination is a subjective examination.

19 . The method according to claim 18 , wherein the subjective examination is performed using a phoropter.

20 . The method according to claim 19 , wherein the phoropter has a resolution of at least 0.25D.

21 . The method according to claim 19 , wherein the phoropter has a resolution of at least 0.125D.

22 . The method according to claim 15 , wherein the bare eye examination is an objective examination.

23 . The method according to claim 22 , wherein the objective examination is performed using a refractometer.

24 . The method according to claim 22 , wherein the objective examination is performed using a device that measures the wavefront of the patient's eye.

25 . The method according to claim 15 , wherein the bare eye examination is a combination subjective and objective examination.

26 . The method according to claim 15 , further comprising the step of prescribing a custom lens for said patient based on said calculated custom lens power.

27 . The method according to claim 26 , wherein the prescribed lens is a free form lens.

28 . The method according to claim 26 , wherein the prescribed lens is a commercially available lens having the closest lens power to the calculated custom lens power.

29 . A computer system for identifying a custom contact lens for a patient comprising:
a memory; a processor; and an input device communicably coupled with said processor and memory and for receiving input from a user;
wherein the computer system is configured to receive as input from a user via said input device a target or actual measured sphere power of a selected fitting lens, results of a bare eye examination performed on said patient, wherein said results include at least a sphere power measurement of said patient's eye, and results of an over-refraction examination performed on said patient while wearing said fitting lens, said results including at least a sphere power measurement, and
wherein said processor is configured to calculate, based on said bare eye and over-refraction examinations, the power delivered by the fitting lens on the patient's eye, an Effectiveness Ratio, and a custom lens power for said patient based on the Effectiveness Ratio and sphere measurement from the bare eye examination, and
wherein said computer system is configured to provide as output said custom lens power and/or a custom contact lens prescription for said patient based on said custom lens power.

30 . The method according to claim 29 , wherein the lens prescribed is for a free form lens.

31 . The method according to claim 29 , wherein the custom lens prescribed is a commercially available lens having the closest lens power to the calculated custom lens power.

32 . A method for identifying a custom contact lens for a patient, comprising:
receiving as input a target or actual measured sphere power of a patient's habitual lens; receiving as input results of an over-refraction examination of a patient wearing said habitual lens, wherein the results of the over-refraction examination include at least a measured sphe

Assignees

• Johnson & Johnson Vision Care

Inventors

• Wildsmith Christopher
• Widman Michael F

Classifications

• A61B3/0025 Primary

  characterised by electronic signal processing, e.g. eye models · CPC title

• G02C7/047 Primary

  Contact lens fitting; Contact lenses for orthokeratology; Contact lenses for specially shaped corneae · CPC title

• A61B3/1015

  for wavefront analysis · CPC title

• A61B3/0285

  Phoropters · CPC title

• G02C7/027 Primary

  considering wearer's parameters · CPC title