Method for assessing residual accommodation in presbyopic eyes

Patent metadata

Field	Value
Publication number	US-9456739-B2
Application number	US-201414532858-A
Country	US
Kind code	B2
Filing date	Nov 4, 2014
Priority date	Dec 20, 2013
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

A system for determining an accommodative force in a patient includes a sensor adapted to detect motion of a lens of the patient relative to a globe of the patient's eye, a controller configured to determine an accommodative force in the patient based on the relative motion and to determine at least one parameter for an intraocular lens based on the accommodative force, and an interface adapted to output the at least one parameter for the intraocular lens.

First claim

What is claimed is:

1. A system for determining an accommodative force in a patient, comprising:
a sensor adapted to detect motion of a lens of the patient relative to a globe of the patient's eye;
a controller configured to determine an accommodative force in the patient based on the relative motion and to determine at least one parameter for an intraocular lens based on the accommodative force; and
an interface adapted to output the at least one parameter for the intraocular lens.

2. The system of claim 1 , wherein the sensor comprises a light source and a photosensor.

3. The system of claim 2 , wherein the photosensor detects Purkinje reflections from an anterior surface of the eye and from at least one surface of the lens.

4. The system of claim 1 , wherein the sensor is an optical coherence tomography (OCT) sensor.

5. The system of claim 1 , wherein the sensor is an ultrasound sensor.

6. The system of claim 1 , wherein the at least one parameter is a haptic tension for the intraocular lens.

7. The system of claim 1 , wherein the at least one parameter is a fill volume for the intraocular lens.

8. A method of determining a parameter for an intraocular lens, comprising:
measuring motion of a lens of a patient relative to a globe of the patient's eye;
determining an accommodative force in the patient based on the relative motion;
determining at least one parameter for an intraocular lens based on the accommodative force; and
outputting the at least one parameter for the intraocular lens.

9. The method of claim 8 , wherein the motion of the lens is measured using a light source and a photosensor.

10. The method of claim 9 , wherein the photosensor detects Purkinje reflections from an anterior surface of the eye and from at least one surface of the lens.

11. The method of claim 8 , wherein the motion of the lens is measured using an optical coherence tomography (OCT) sensor.

12. The method of claim 8 , wherein the motion of the lens is measured using an ultrasound sensor.

13. The method of claim 8 , wherein the at least one parameter is a haptic tension for the intraocular lens.

14. The method of claim 8 , wherein the at least one parameter is a fill volume for the intraocular lens.

Assignees

• Novartis Ag

Inventors

• Campin John A
• Pettit George H
• Stanley Daniel W

Classifications

• A61B3/10 Primary

  Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions · CPC title

• A61B3/0025 Primary

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

• A61B3/102

  for optical coherence tomography [OCT] · CPC title

• A61B3/1173

  for examining the eye lens · CPC title