Abstract: According to one or more embodiments, the processes and systems disclosed allow for displaying objects on a screen at a desired visual angle, and more particularly, in one aspect, to systems and methods for displaying optotypes during an eye examination.

Abstract: A server in communication with a first device capable of receiving input from a camera attached to the first device, and a second device capable of displaying output, is provided. The server is configured to receive, from the first device, data relating to characteristics of the camera and characteristics of an image obtained by the camera of a screen of the second device; determine a screen pixel length of the screen; and provide instructions to the second device to display on the screen an object at a desired visual angle in response to the data received from the second device and the screen pixel length, while the first device is positioned at an arbitrary distance from the screen.

Abstract: A process is provided for conducting an eye examination using a mobile device, the process comprising capturing a first image of an object using a camera of a mobile device set to a fixed focusing distance; determining, with reference to the first image, an absolute size of the object; capturing a second image of the object using the camera of the mobile device; determining, with reference to the second image, a distance from the mobile device to the object; providing an indication via the mobile device to move the mobile device relative to the object; and receiving input from the mobile device in response to the eye examination program.

Abstract: A process for assessing at least one characteristic of a user's vision includes determining a characteristic of at least one camera of a mobile device; using the at least one camera, capturing at least one image of an object; determining, with reference to a portion of the at least one image composed of the object, a distance from the mobile device to the object at a time of capture of the at least one image; and receiving input from the user in response to material presented on the object.

Abstract: According to one or more embodiments, the processes and systems disclosed allow for displaying objects on a screen at a desired visual angle, and more particularly, in one aspect, to systems and methods for displaying optotypes during an eye examination.

Abstract: According to one or more embodiments, the processes and systems disclosed allow for displaying objects on a screen at a desired visual angle, and more particularly, in one aspect, to systems and methods for displaying optotypes during an eye examination.

Abstract: According to one or more embodiments, the processes and systems disclosed allow a user of a mobile device to determine their distance from an object. The object may be an image of a pattern having a known size. The image may be displayed on a computer screen or other suitable medium such as a printed sheet. According to one or more embodiments, the disclosed processes and systems aid in determining or guiding a user to a distance at which an eye examination is conducted.

Abstract: According to one or more embodiments, the processes and systems disclosed allow a user of a mobile device to determine their distance from an object. The object may be an image of a pattern having a known size. The image may be displayed on a computer screen or other suitable medium such as a printed sheet. According to one or more embodiments, the disclosed processes and systems aid in determining or guiding a user to a distance at which an eye examination is conducted.