Hasta La Gadget!

CATRA is an invention of MIT’s Media Lab which uses a cellphone and a cheap plastic eyepiece to detect cataracts. Not only is it cheaper and easier to use than existing solutions, it actually provides much better results.

Cataracts cause blindness by fogging the lens of the eye, scattering light before it reaches the retina. Normally, they are diagnosed using a “backscatter” device which shines light into the eye and measures how much of it is reflected by the cataract. This requires a skilled user, a fancy machine and still doesn’t detect the problem early, nor tell the operator what the patient actually sees.

CATRA uses a smartphone with a custom app, and a cheap eyepiece. The patient holds it up to their eye and the app fires light successively at each part of the eye. The patient uses “the phone’s arrow keys” to adjust the brightness of these beams until they match. The app logs the differences in intensity required to reach the retina and creates a map of the eye. Thus is can detect the problem early, and also reflects the actual experience of the patient.

But most important, it requires no special hardware except for that simple eyepiece.

The product is about to undergo field testing for a future launch. The market for this is clearly the developing world, which is also the place where cellphone usage is taking off. It might be time to forget about programs like One Laptop Per Child and instead concentrate on the using smart-phones instead.

CATRA: Cataract Maps with Snap-on Eyepiece for Mobile Phones [MIT Media Lab via Cult of Mac]

See Also:

• Cellphones Affect Medical Equipment Says Study
• Android App Tracks, Helps Wandering Alzheimer's Sufferers
• MIT Exoskeleton: A Partial Success