US 9,492,074 B1 · Computerized refraction and astigmatism determination

Abstract

The present disclosure relates generally to a system and method for determining the refractive error of a patient, more particularly determining the patient's refractive error by using a computerized screen, and providing the patient with a prescription for the patient's preferred type of corrective lenses. The system and method do not require the trip or expense of a doctor visit, and are optimized for convenience and cost effectiveness. In a general embodiment, the present disclosure provides a method for determining a corrective lenses prescription of a patient. The method includes, separately, for each eye of the patient, determining an astigmatism prescription for the patient via a computerized screen and without the use of a refractor lens assembly, including testing for a cylinder component and an axis component at the same time by presenting at least one diagram to the patient via the computerized screen and enabling the patient to select at least one input per diagram corresponding to a cylinder measurement and an axis measurement for the corrective lenses prescription for the patient.

Claims20

Dependent claims

A method for determining a corrective lenses prescription for a patient comprising, separately, for each eye of the patient:

determining an astigmatism prescription for the patient via a computerized screen and without the use of a refractor lens assembly, wherein determining the astigmatism prescription for the patient comprises testing for a cylinder component and an axis component at the same time by presenting at least one diagram to the patient via the computerized screen and enabling the patient to select at least one input per diagram, wherein the at least one input per diagram corresponds to a cylinder measurement and an axis measurement used to determine the cylinder component and the axis component of the corrective lenses prescription for the patient.

A non-transitory computer readable medium including a plurality of instructions, which when executed by at least one processor, cause the at least one processor to operate with at least one display device and at least one input device to determine a corrective lenses prescription for a patient comprising, for each eye of a patient:

(a) determining, without the use of a refractor lens assembly, an astigmatism prescription for the patient by,
(i) presenting at least one diagram to the patient via the computerized screen, and
(ii) enabling the patient to select at least one input per diagram, wherein the at least one input per diagram corresponds to a cylinder measurement and an axis measurement used to determine the corrective lenses prescription for the patient;
(b) determining, without the use of a refractor lens assembly, a power prescription for the patient by,
(i) presenting a first figure to a patient via the computerized screen, wherein the first figure is too small to be clearly seen by the patient,
(ii) enabling the patient to make at least one input to increase the size of the first figure until it can just barely be made out by the patient, wherein the at least one input corresponds to a first sphere measurement,
(iii) presenting a second figure to a patient via the computerized screen, wherein the second figure is large enough to be clearly seen by the patient, and
(iv) enabling the patient to make at least one input to decrease the size of the second figure just until it can no longer be made out by the patient, wherein the at least one input corresponds to a second sphere measurement;
wherein a final sphere measurement is based, at least in part, on the first sphere measurement and the second sphere measurement.

6 more elements

Dependencies are inferred from the claim text.

Computerized refraction and astigmatism determination

Life of this patent

Computerized refraction and astigmatism determination

Life of this patent

Abstract

Claims20