VISION PRESCRIPTION, MEASURING METHOD AND MEASURING APPARATUS, AND A LENS PRODUCTION METHOD

• US 20130188143A1
• Filed: 10/03/2011
• Published: 07/25/2013
• Est. Priority Date: 10/06/2010
• Status: Active Grant

• Current Assignee: Shamir Optical Industry Limited (EssilorLuxottica SA)
• Original Assignee: Shamir Optical Industry Limited (EssilorLuxottica SA)
• Inventors: Katzman, Dan, Carmon, Yuval
• Granted Patent: US 9,164,295 B2
• Time in Patent Office: Days
• US Class Current: 351/216
• CPC Class Codes: A61B 3/00 Apparatus for testing the eyes; Instruments for examining the eyes eye inspection using ultrasonic, sonic or infrasonic waves A61B8/10; devices for treatment of the eyes A61F9/00; exercisers for the eyes A61H5/00; optical systems in general G02B
• CPC Class Codes: A61B 3/0025 characterised by electronic signal processing, e.g. eye models
• CPC Class Codes: A61B 3/0285 Phoropters
• CPC Class Codes: A61B 3/103 for determining refraction, e.g. refractometers, skiascopes
• CPC Class Codes: G02C 7/027 considering wearer's parameters
• CPC Class Codes: G02C 7/061 Spectacle lenses with progressively varying focal power

Abstract

A method for determining parameters of the vision of an eye of a patient. The method comprises: constituting a part of a process of making a prescription for a corresponding lens via which the patient is expected to gaze in at least two different directions; and measuring in one of the two directions all of the following parameters of the eye'"'"'s vision: sphere power, cylinder and cylinder axis, and measuring in the other of the two directions at least two of said parameters.

Claims

1-12. -12. (canceled)

13. A method for determining parameters of the vision of an eye of a patient, the method comprising:

constituting a part of a process of making a prescription for a corresponding lens via which the patient is expected to gaze in at least two different directions; and

measuring in one of the at least two different directions all of the following parameters of the eye'"'"'s vision;

sphere power, cylinder and cylinder axis, and measuring in the other of the two directions at least two of the parameters.

14. The method according to claim 13, wherein the at least two different directions are three or more directions.

15. A method of producing a lens based on a prescription for an eye of a patient expected to gaze in at least two different directions via a progressive addition lens, including:

at least an indirect indication of the at least two different directions of gaze;

an indication of the eye'"'"'s sphere power, cylinder and cylinder axis in one of the at least two different directions of gaze; and

an indication of at least two of the eye'"'"'s sphere power, cylinder and cylinder axis, in the other one of the at least two different directions of gaze, the method comprising;

designing the lens as having a number of design points corresponding to the number of the at least two different directions of gaze indicated in the prescription, the number of design points being defined by the same parameters as those indicated in the prescription for their respective directions of gaze; and

manufacturing the lens corresponding to the above design.

16. The method according to claim 15, wherein the at least two different directions are three or more directions.

17. An apparatus for measuring vision of an eye of a patient, comprising:

a face positioning device configured for placement of the patient'"'"'s face so as to bring his/her eye in a fixed position;

a vision measuring device having an optical axis and at least one lens positionable on the axis; and

a moving mechanism configured to move at least a part of the vision measuring device relative to the face positioning device such as to orient the optical axis in at least two different directions in each of which the optical axis passes through the fixed position.

18. The apparatus according to claim 17, wherein the at least two different directions are three or more directions.

19. The apparatus according to claim 17, wherein the moving mechanism is configured to move at least a part of the vision measuring device so that each point on the optical axis moves along a trajectory lying on a spherical surface.

20. The apparatus according to claim 17, wherein the vision measuring device includes a lens positioning device configured to position the at least one lens at a desired distance from the fixed position along the optical axis in the at least two different directions thereof.

21. The apparatus according to claim 17, wherein the vision measuring device is an automated refractor.

22. The apparatus according to claim 17, wherein the vision measuring device is a phoropter.

23. The apparatus according to claim 17, wherein the vision measuring device further includes at least one additional lens positionable on the optical axis.