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Scientists develop autofocals for presbyopia

Eye tracking sensors keep fluid filled lenses in constant focus

17 Jul 2019 by Selina Powell

Stanford University researchers have developed prototype autofocal spectacles for correcting presbyopia.

Describing the technology in Science Advances, the researchers highlighted that presbyopia affects nearly 20% of people worldwide.  

The prototype spectacles use eye tracking technology and depth sensor data to drive focus-tunable lenses.

The researchers evaluated the spectacles on visual acuity, contrast sensitivity and a refocusing tasks in 19 users.

“Autofocals exhibit better visual acuity when compared to monovision and progressive lenses while maintaining similar contrast sensitivity,” the scientists highlighted.

“On the refocusing task, autofocals are faster and, compared to progressives, also significantly more accurate,” they observed.

In another study, the spectacles were ranked to be the best correction in terms of ease of refocusing by 23 out of 37 users.

“Our work demonstrates the superiority of autofocals over current forms of presbyopia correction and could affect the lives of millions,” the researchers emphasised.

Image credit: Pixabay

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