Systems and methods for measuring refractive error and ophthalmic lenses provided therefrom

Patent metadata

Field	Value
Publication number	US-9980638-B2
Application number	US-201415309862-A
Country	US
Kind code	B2
Filing date	Nov 20, 2014
Priority date	May 12, 2014
Publication date	May 29, 2018
Grant date	May 29, 2018

Abstract

Systems and methods for providing identification factors for an individual wearer. Some or all of the identification factors when within a predetermined value provide a prescription and corrective ophthalmic lenses for a selected individual wearer, the corrective ophthalmic lens having at least one correction that is to the nearest 0.20 diopter, or is in a range between about the nearest 0.01 diopter and about the nearest 0.20 diopter. The prescription and corrective ophthalmic lenses are obtained by at least first analysis performed with a first instrument, a second analysis performed with a second instrument, and a third analysis performed with a third instrument, in which each instrument is different, and each analysis is different.

First claim

The invention claimed is:

1. A method for providing a prescription for a corrective ophthalmic lens for a selected individual wearer, the method comprising:
using a first instrument, identifying in a first analysis a first identification factor from a plurality of parameters for evaluating an individual wearers' level of perception and control;
using a second instrument, identifying in a second analysis a second identification factor, wherein the second instrument includes equipment for objectively measuring refractive error in an eye, wherein the second analysis is performed when the first identification factor is within a predetermined value;
using a third instrument, identifying in a third analysis a third identification factor, wherein the third instrument includes equipment for subjectively evaluating refraction in an eye and refraction is evaluated using an incremental change that is lower than 0.20 diopter, or is in a range between about the nearest 0.01 diopter and about the nearest 0.20 diopter, wherein the third analysis is performed when the second identification factor is within a predetermined value; and
generating a prescription based on the refraction obtained from at least one of the second instrument and the third instrument, wherein the prescription includes at least one correction that is to the nearest 0.20 diopter, or is in a range between about the nearest 0.01 diopter and about the nearest 0.20 diopter.

2. The method of claim 1 , further comprising after dispensing the prescription, identifying in a fourth analysis a fourth identification factor, wherein the fourth analysis includes a visual acuity assessment.

3. The method of claim 2 , further comprising providing an indicator of performance criterion.

4. The method of claim 1 , wherein the plurality of parameters are questions provided in a questionnaire.

5. The method of claim 1 , wherein the refractive error is one or more of a total root mean square of at least about 0.3 diopter or less in each eye and at least about 0.2 diopter or less in each eye.

6. The method of claim 1 , wherein the refractive error is measured using a wavefront aberrometer.

7. The method of claim 1 , wherein the first identification factor is associated with having self confidence and organizational skills.

8. The method of claim 1 , wherein the second identification factor of the wearer is identified when the wearer presents a difference between auto refraction and wavefront refraction that is (i) equal to or less than 0.5 diopter sphere or equal to or less than 0.5 diopter cylinder and (ii) equal to or less than 10 degree axis.

9. The method of claim 1 , further comprising:
determining a sensitivity factor for the wearer, the sensitivity factor being indicative of the wearer's ability to perceive a change lower than 0.25 diopter, where the higher the sensitivity factor, the more suitable a wearer is for an enhanced corrective ophthalmic lens.

10. The method of claim 9 , wherein the first instrument comprises a wavefront aberrometer or an autorefractor.

11. The method of claim 9 , wherein one of the plurality of parameters is related to a pupil diameter of the wearer.

12. A system for evaluating a wearer in need of a corrective ophthalmic lens, the system comprising:
a kiosk for performing a first analysis by evaluating a wearers' level of perception and control, and for providing information about the personal perception and control of the wearer, in the first analysis a first identification factor is identified from a plurality of parameters for evaluating the wearers' level of perception and control;
a first equipment for performing a second analysis by objectively measuring a wavefront of each eye of the wearer and for providing information about the wavefront, in the second analysis a second identification factor is identified, the second analysis being performed when the first identification factor is within a predetermined value; and
a subjective refraction analyzer for performing a third analysis by measuring subjectively refraction in each eye of the wearer and for providing information about the refraction, in the third analysis a third identification factor is identified, the third analysis being performed when the second identification factor is within a predetermined value, wherein the refraction is evaluated using an incremental change that is lower than 0.20 diopter, or is in a range between about the nearest 0.01 diopter and about the nearest 0.20 diopter.

13. The system of claim 12 , wherein the system determines that a wearer is in need of the corrective ophthalmic lens when the information about the personal perception and control of the wearer indicates the wearer as having one or more of self confidence and organizational skills, and when the information about the wavefront provides a total root mean square value of 0.3 diopter or less, and when the wearer perceives the incremental change that is lower than 0.20 diopter, or is in a range between about the nearest 0.01 diopter and about the nearest 0.20 diopter.

14. The system of claim 12 , wherein one or more of the kiosk, the first equipment, and subjective refraction analyzer are operably linked.

Assignees

• Essilor Int

Inventors

• Keita Gabriel
• Purcell Howard

Classifications

• G02C7/027 Primary

  considering wearer's parameters · CPC title

• A61B3/103

  for determining refraction, e.g. refractometers, skiascopes · CPC title

• A61B3/1015

  for wavefront analysis · CPC title

• A61B3/028 Primary

  for testing visual acuity; for determination of refraction, e.g. phoropters · CPC title

• A61B3/0033

  characterised by user input arrangements · CPC title