Systems for determining eye refraction
Mobile computer devices and systems for refraction determination of an eye, for example for objective refraction determination and/or subjective refraction determination, are provided. Here, a display of the mobile computer device can be driven to display an image for refraction determination.
1. A system for determining subjective refraction of the eye or eyes of a person, the system comprising:
a mobile computer device having a display, a processor, and a non-transitory computer-readable medium having program code stored therein;
said program code, when executed on the processor, causing said processor to drive said display to display an image thereon for determining the subjective refraction of an eye;
said image including a background and elements shown thereon;
said background of said image defining a first brightness, wherein said first brightness of said background is configured to be settable for setting a surround luminance;
said first brightness of said background of said image being configured to be settable independently of a second brightness of said elements and to be selectively settable to one of at least two different predefined brightness values;
said at least two different predefined brightness values of said first brightness being from a group including a first predefined brightness value in a range of scotopic vision with a first luminance of less than 0.03 cd/m 2 , a second predefined brightness value in a range of phototopic vision with a second luminance of greater than 3 cd/m 2 and a third brightness value in a range of mesopic vision with a third luminance between said first luminance and said second luminance so as to permit the determination of the refraction of the eye to be carried out in different ranges of vision;
viewing optics for viewing said mobile computer device with at least one eye of a person to be examined; and,
said viewing optics including a first optical unit for a first eye and a second optical unit for a second eye to facilitate determination of said subjective refraction.
2. The system of claim 1 further comprising a combination of polarizer and analyzer for at least one eye.
3. The system of claim 1 , wherein said viewing optics include a microlens arrangement.
4. The system of claim 1 , wherein said viewing optics include a microlens film to be fitted on said display of said mobile computer device.
5. The system of claim 1 , wherein said viewing optics include at least one of a color filter, a red filter, and an infrared filter.
6. The system of claim 1 , further comprising a beam splitter arranged between the display of the mobile computer device and the at least one eye, wherein the beam splitter is arranged to direct light emerging from the eye to a camera unit.
7. The system of claim 1 further comprising a shutter for at least one eye.