Systems for determining eye refraction

A system for determining subjective refraction of the eye or eyes of a person to facilitate selection of an eye glass lens or contact lens by said person, the system comprising:

• a mount to be worn on a head or held thereagainst;
• a mobile computer device provided in said mount;
• said mobile computer device having a display, a processor, and a non-transitory computer-readable medium;
• said non-transitory computer-readable medium having a program code stored therein;
• said program code, when executed on the processor, causing said processor to drive said display to display structurally illuminated images thereon in a common plane defined by said display for viewing by said person to determine the subjective refraction of the left and right eyes of said person;
• said mount having viewing optics for viewing said display of the mobile computer device with at least one eye of a person to be examined;
• said mount further having an exchange holder for holding an exchange optical unit for the subjective refraction determination being provided by receiving an indication from said person whether an impression of the images displayed on said display changes sharpness to become sharper or less sharp in response to the exchange of optical units and so arrive at eye glass lenses or contact lenses having refractive properties required by said person to best view the images;
• said mount further including a combination of a polarizer for suppressing extraneous light and an analyzer configured for at least one eye;
• and,
• said viewing optics defining mutually adjacent optical viewing paths to said display for the left and right eyes, respectively, of said person.

A method for determining subjective refraction of the eye or eyes of a person to facilitate selection of an eye glass lens or contact lens by said person, the method comprising the steps of:

• providing a mobile computer device in a mount, wherein the mobile computer device has a display, a processor, and a non-transitory computer-readable medium, wherein the non-transitory computer-readable medium has a program code stored therein;
• wearing the mount on a head of the person or holding it thereagainst with the mount defining mutually adjacent optical viewing beam paths to said display;
• executing the program code on the processor causing the processor to drive the display to display structurally illuminated images thereon in a common plane defined by said display for viewing by said person to determine the subjective refraction of the left and right eyes of said person;
• inserting first optical units having a first refractive power into said mount for imaging the structurally illuminated images on said display to the left eye and the right eye, respectively, in corresponding ones of said beam paths;
• and,
• removing said first optical units and inserting second optical units having a second refractive power different from said first refractive power into said mount in corresponding ones of said beam paths for imaging said images concerning the left eye and the right eye, respectively, on said display to the left eye and the right eye to facilitate determination of said subjective refraction by receiving an indication from said person as to whether an impression of the images displayed on said display changes in sharpness to become sharper or less sharp in response to the exchange of said second optical units for said first optical units and so arrive at eye glass lenses or contact lenses having refractive properties required by said person to best view the images.