Virtual retinal display - A NEW SIGHT
- 1. VIRTUAL RETINAL DISPLAY By-Vinayak Parashar
- 2. Introduction A virtual retinal display (VRD), also known as a retinal scan display (RSD) or retinal projector (RP), is a display technology that draws a raster display (like a television) directly onto the retina of the eye. The user sees what appears to be a conventional display floating in space in front of them.
- 3. Working Of Virtual Retinal Display
- 4. Features of Virtual Retinal Display Color Range Resolution Luminance and Viewing Modes Contrast Ratio Power Consumption Cost
- 5. RETISSA Retinal Imaging Laser Eyewear uses laser technology to directly project images onto the retina from a miniature projector. The user can view images from an embedded camera or digital data from external input. It is mainly being developed as a medical device for the purpose of supporting the visual function of people with low vision (visually impaired but not completely blind), who have irregularities in the anterior part of their eyes.
- 6. Features Of RETISSA 1. Focus free i.e. image clarity is independent of individual focusing function, refractive error, and the focal position of the eye lens. 2. Universal design like normal correcting or sunglasses, owing to small optics inside the glasses frame. 3. Augmented reality, i.e., a digital image is augmented in the real-world environment, independent of the focal position of the wearer since the image is always clear on the retina.
- 7. Components of RETISSA The eyewear is connected to the controller with a sealed line 4mm in diameter combining an optical fibre and electric lines. • The controller includes an RGB laser combiner module • laser/MEMS controllers • an image processor • a chargeable battery The frame includes • the projection unit consisting of the MEMS mirror package • the free-surface reflection mirror & collimating optics.
- 8. Images are directly drawn from a projector by retinal scanning using RGB lasers and MEMS mirrors Since the laser beam goes directly to the retina, there is no focus(neither “conversion” nor “algorithm”). In other words it is independent of visual acuity (clarity of vision) and point of focus Working of RETISSA
- 9. Application in Low vision aid • Focus free ：Visual aid for anterior part impairment of ametropia and clouding. • Projection of processed image: Visual aid for retinopathy by projection to Preferred Retinal Locus (PRL), image magnification or compression, customized contrast, and optimized intensity.
- 10. Clinical Test Results 35 non-handicapped people with the age of 30-60 VIA RETISSA X VIA Naked
- 11. Clinical Test Results (contd..) 30 cataract patients with the age of 70-90 VIA RETISSA X VIA Naked
- 12. Conclusion of the Test The point is that the RETISSA visual acuity is independent of the naked visual acuity, due to focus free, and the low visual acuity can be increased up to around 0.5 not only in non-handicapped people but also in the cataract patients
- 13. Applications of Virtual Retinal Display - Giving a speech while information is streamed to your eyeglasses in real time. - Presenting to a crowd with your notes secretly stowed away in your eye glasses. - Extending your everyday computing environment to include your eyewear display - Walking down the street, seeing your favorite friends show up "on screen" 2 blocks and 1 cafe away - Receiving turn by turn directions as you walk toward your destination - Reviewing messages while on the go - Creating your personal big screen experience from mobile TV and video (occluded or escape mode) - Seeing building schematics and locations of others (especially useful for security or firefighters) - Viewing virtual recipes while cooking without losing your rhythm.
- 14. REFERNCES • Development of Retinal Imaging Laser Eyewear RETISSA®for Low Vision Support, http://qdlaser.com/cms/wp-content/uploads/2015/10/press- release_e_retissa_qdlaser_2.pdf • K. Ranganath, M.Sravanthy, P.Krupali: SCREENLESS DISPLAYS – THE EMERGING COMPUTER TECHNOLOGY Vol. 1, Issue 3, pp.942- 947
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