Researchers Created Eye-Tracking Glasses That Automatically Focus

CTVKhanhL - Jul 11, 2019, 3:47 pm IST


Called an ‘autofocals’, the pair of smart glasses is still in its prototype phase. It utilizes a pair of lenses filled with fluid that can automatically adjust themselves to be thicker or thinner to adjust their focal distance.

If you’re still young, you can still be happy with relatively healthy eyesight. But by the time you reach your 40s, it’s probable that your eyes will have a common condition called presbyopia. As you get older, the lenses in your eyes become less elastic, making it harder for you to focus on objects that are close. For example, the prints on a book. Traditionally, this condition can be ‘cured’ by reading glasses, or glasses that can limit your eyes’ focal range with progressive lenses.

Autofocals-Stanford
The pair of glasses made by Stanford's researchers can focus on objects automatically.

That’s the old way of doing it. Now, the researchers at Stanford University have thought up of a modern solution for the problem: A high-tech pair of glasses that can automatically detect what the wearer is looking at and focus on it for them.

There are benefits to wearing progressive lenses: No one wants the extra work of having to reach out for your reading glass when you need it only briefly like when you want to read a menu or take a glance through your phone. But progressive lenses require you to move your head awkwardly to focus on different objects because of the limited peripheral focus. That is an unnecessary hassle that the project at Stanford could potentially resolve.

Called an ‘autofocals’, the pair of smart glasses is still in its prototype phase. It utilizes a pair of lenses filled with fluid that can automatically adjust themselves to be thicker or thinner to adjust their focal distance.

In the past, there have been similar models used to simulate how the lenses within the human’s eyes work. However, this project enhanced the specifications greatly by adding sensors that could track where and what the wearer is looking at by triangulating. The sensors then send data to a processor, which will take up the role of automatically adjusting the lenses so that objects will always be in perfect focus no matter the distance between the object and the user.

smart-glasses
Called an ‘autofocals’, the pair of smart glasses is still in its prototype phase.

A test composed of 56 patients with presbyopia and all received positive reactions. All agreed that the pair of autofocals is vastly superior to progressive lenses and quicker to reach than reading glasses. The only drawback is the weight and the bulk of the autofocals, which is the size of a Virtual Reality headset.

That is currently the biggest obstacle for the researchers in their hope of bringing the technology into the wider public. People have been used to glasses being thin and lightweight. But the moment you add into the glasses sophisticated sensors, cameras, batteries, e.t.c. it’s going to balloon in size, making the glasses impractical for daily use.

The researchers are hoping that the tech available on the autofocals can one day be miniaturized, and one pair of autofocals can serve a person for several years without an upgrade. Pretty much like the ordinary glasses today. However, that day is still pretty far ahead while we are waiting for technology to catch up with the pace of research and development.

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