Indian origin scientist’s smartphone app for home eye testsJune 24th, 2010 - 2:00 pm ICT by ANI
London, June 24 (ANI): Going to an eye clinic for a simple eye test may soon become passé, thanks to the efforts of an Indian-origin American scientist, who has developed a simple method of testing eyes by using a smartphone and a specially designed eyepiece.
The application, a brainchild of Ramesh Raskar of the Camera Culture group at the Massachusetts Institute of Technology, could provide a home-based eye test for millions of people who cannot easily access regular optometry services.
Raskar’s Near-to-Eye Tool for Refractive Assessment (Netra) comprises a viewer that fits over a cellphone’s screen combined with software running on the phone.
To test a person’s eyesight, the phone displays an image - which may appear as a pair of parallel lines, say - on the screen, which the eyepiece converts into a virtual 3D display.
Thereafter, the subject has to focus on the image and use the phone’s keyboard to adjust the lines so that they merge.
The extent of the adjustment needed reveals the amount of correction the eye will require to focus clearly.
That is translated in to dioptres - a number which opticians can use to provide corrective lenses.
“It can be thought of as a thermometer for visual performance,” The New Scientist quoted Raskar as saying.
A traditional 3D display presents a slightly different view to the left and right eyes.
The Netra creates an illusion of 3D in a different way - by presenting different views to different parts of the same eye simultaneously.
If the person has perfect eyesight, these separate images will overlap and appear as a single image, points out postdoctoral researcher Ankit Mohan, who worked on the design.
If the person’s vision needs correcting, they will see parallel lines that they will adjust so that they merge into one. So instead of a subjective blur test using reading charts, the eye test is converted into a simpler alignment problem.
The work will be presented at the Siggraph conference in Los Angeles in July. (ANI)
- Cheap reading glasses 'can cost you your eyesight' - Oct 28, 2010
- Apple designing 'no-glasses' 3D technology - Dec 27, 2010
- Cheap reading glasses can damage your vision - Oct 28, 2010
- Indian-origin researcher creates 6-D holograms that interact with light - Aug 29, 2008
- Birds could better pilot-less aircraft - Oct 29, 2011
- Enjoy 3D movies without glasses - Aug 19, 2012
- Indian origin scientist develops new projection technology - Jul 07, 2010
- 'X-ray vision' laser camera shoots 'invisible objects' around corners - Nov 19, 2010
- Capture, watch 3D visuals on LG phone - minus the glasses - Feb 15, 2011
- Now, get yourself your dream body, but only in your movie - Oct 08, 2010
- '3 Idiots' UAV inducted into counter-insurgency operations - Jan 30, 2012
- Nintendo's new 3D gizmo could harm kids' eyesight - Jan 02, 2011
- Say goodbye to traditional bifocals, welcome electronic spectacles - Jun 20, 2010
- Safer CT scanning for kids developed - Apr 05, 2011
- Avoid 3D TV - it can make you really sick - Dec 17, 2010
Tags: alignment problem, american scientist, corrective lenses, culture group, eye clinic, eye test, eye tests, eye tool, eyepiece, image points, indian origin, massachusetts institute of technology, netra, new scientist, optometry services, parallel lines, perfect eyesight, s vision, simple eye, visual performance