BIOMETRIC AUTHENTICATION IN OPHTHALMIC DEVICES

1 . A system, comprising:

an ophthalmic diagnostic device configured to obtain diagnostic measurements of a patient's eye, the patient's eye including an iris and a cornea;

an imaging device configured to capture an image of the iris;

an optical sensor integrated with the imaging device and configured to detect a position of the iris with respect to the optical sensor; and

a computing device in communication with the ophthalmic diagnostic device, the imaging device, and the optical sensor, wherein the computing device is configured to:

determine, based on the image of the iris and the position of the iris, whether the iris matches a known patient's iris; and

perform a diagnostic measurement of the patient's eye based on the determining.

2 . The system of claim 1 , wherein the ophthalmic diagnostic device is configured to measure intraocular pressure of the patient's eye.

3 . The system of claim 2 , further comprising an optical sensor configured to measure deflection of the patient's eye in response to pressure applied by the ophthalmic diagnostic device.

4 . The system of claim 2 , wherein the computing device is configured to determine deflection of the patient's eye in response to pressure applied by the ophthalmic diagnostic device using data obtained from the imaging device.

5 . The system of claim 1 , wherein the imaging device includes:

a light source configured to illuminate the patient's eye with an incident light; and

a camera configured to capture an image of the patient's eye that includes a reflection of the incident light.

6 . The system of claim 5 , wherein the imaging device is configured to detect a Purkinje image produced by the incident light reflected from the cornea of the patient's eye.

7 . The system of claim 6 , wherein the computing device is configured to calculate a curvature of the cornea based on the Purkinje image.

8 . A system, comprising:

an iris imaging module including:

a light source configured to illuminate iris of an eye with an incident light; and

a camera configured to capture an image of the iris, the image including a reflection of the incident light on the eye;

a proximity sensor in communication with the iris imaging module and configured to measure a size of the iris; and

an iris authentication module including a memory and a processor in communication with the memory, wherein the iris authentication module is configured to:

determine, based on the reflection of the incident light on the eye in the image, a curvature of the eye, and

authenticate the iris based on the curvature of the eye.

9 . The system of claim 8 , wherein the light source includes at least one light-emitting diode (LED).

10 . The system of claim 8 , further comprising an ophthalmic device integrated with at least one of the iris imaging module and the proximity sensor.

11 . The system of claim 10 , wherein the ophthalmic device is a non-contact tonometer.

12 . The system of claim 10 , wherein the ophthalmic device is an ocular drug delivery system.

13 . The system of claim 8 , wherein the light source is configured to emit the incident light in a defined pattern, and wherein the image detected by the camera is a Purkinje image including a distorted reflection of the defined pattern off a cornea.

14 . A method, comprising:

providing an iris recognition system including at least an imaging module and a proximity sensor;

capturing an image of a patient's iris using the imaging module;

determining a distance of the iris from the proximity sensor;

determining a size of the iris based on the determined distance and the captured image;

determining, based on the captured image, a curvature of a cornea of the patient; and

comparing the captured image and at least one of the size of the iris or the curvature of the cornea with corresponding data stored in a database to confirm an identity of the patient, wherein the confirmation is based on a matching threshold.

15 . The method of claim 14 , further comprising:

providing an ophthalmic system configured to obtain a diagnostic measurement of the patient's eye, wherein the ophthalmic system is integrated with the iris recognition system; and

obtaining, based on confirming the identity of the patient, the diagnostic measurement of the patient's eye using the ophthalmic system.

16 . The method of claim 15 , further comprising adjusting the matching threshold based on confirming the identity of the patient.

17 . The method of claim 15 , wherein the ophthalmic system includes a non-contact tonometer.

18 . The method of claim 14 , wherein the determining the curvature of the cornea includes analyzing a Purkinje image reflected from the cornea.

19 . The method of claim 14 , wherein the determining the size of the iris includes:

calculating a relative dimension of the iris based on the captured image;

determining a position of the iris with respect to the proximity sensor; and

determining an absolute dimension of the iris based on the calculated relative dimension and the position of the iris.

20 . The method of claim 14 , wherein the matching threshold is a Hamming distance threshold, and wherein the comparing the captured image and the at least one of the size of the iris or the curvature of the cornea includes comparing a difference between the captured image and a stored authentication image to the Hamming distance threshold.