Virtual Dictionary
VRD
A VRD or Virtual Retinal Display – occasionally called a direct retinal display - is an offshoot of HMD display technology, which, instead of placing a pair of display screens in front of the eyes, actually projects an image directly onto the human retina with low-energy lasers or LCDs.
As such it bypasses the focussing mechanisms of the eye, and thus avoids any eyestrain or muscle ache no matter how long a period the display system is used for. The display itself handles focussing, so the eye is free to focus as it wishes to, to focus on an image which appears to be further away. In principle the technology can provide full-colour, high-resolution dynamic displays, that feel utterly real in palette.
See Also: HMD, Asthenopia, Computer Vision Syndrome, Digital Eye Fatigue
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