Computerized refraction and astigmatism determination

Abstract

The present disclosure relates generally to systems and methods for determining the refractive error of a patient, more particularly determining the patient's refractive error by using a computerized screen, and providing a prescription for the patient's preferred type of corrective lenses. 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 instructing the patient to move a known, fixed distance away from a computerized screen and testing for a cylinder component by sequentially presenting at least two cylinder diagrams to the patient via the computerized screen and enabling the patient to select at least one input per cylinder diagram, where those inputs correspond to cylinder measurements for determining the prescription.

The invention is claimed as follows: 
     
         1 : 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 a remote terminal and a handheld terminal to determine a corrective lenses prescription for a patient by:
 receive, in an online portal, a first message to begin a session from the remote terminal;   responsive to the first message, start the session;   receive, in the online portal, patient information including a prior corrective lenses prescription;   receive, in the online portal, a second message including an electronic address of the handheld terminal;   transmit a message to the handheld terminal using the electronic address, the message including a link to the session;   receive, in the online portal, a connection request from the handheld terminal;   associate the handheld terminal and the remote terminal with the same session after receiving the connection request;   use the prior corrective lenses prescription to select eye examination diagrams for the session, the eye examination diagrams associated with corresponding input interfaces;   during the session, cause the eye examination diagrams to be sequentially displayed by the remote terminal while causing the corresponding input interfaces to be displayed by the handheld terminal;   during the session, receive at least one input from the input interface displayed by the handheld terminal and associate the received at least one input to the currently displayed eye examination diagram;   determine the corrective lenses prescription using the received inputs in relation to the corresponding eye examination diagrams; and   transmit information to the handheld terminal or the remote terminal that is indicative of the eye examination diagram.