A research team at the University of Utah was led by an electrical and computer engineering professor Carlos Mastrangelo and Nazmu Hasan, a doctoral student at the same University. Mastrangelo suffers from a vision problem and was advised by a doctor to wear glasses whenever he wants to read. The professor himself decided to solve the problem and created the smart glasses.
These glasses are made with lenses that are liquid based. It can directly adjust as to the focus of the person's sight either it's near or far. The research gained interest and was recently published in the journal's special edition, Optics Express. The work was also co-authored by Professor Hanseup Kim, an electrical and computer engineering associate and Aishwaryadev Banerjee, a graduate researcher.
As for how these smart glasses work, in the bridge of the glasses, it has a distance sensor that works using an infrared light which can calculate the total distance between the glasses and the object insight. The sensor will tell the actuators how to reshape the liquid lenses that are curved. This response is phenomenal according to Mastrangelo.
The focal lengths are controlled by the curvature of the lens that also happens as well as in the eyes naturally. If the person is young, the lenses of the eyes are normally flexible that can easily change the curvature. This can allow the person to focus objects from afar and up-close. However, as the person gets old, eye lenses turns to rigid which is the main reason of difficulties in reading.
It usually takes 14 milliseconds to change focus with the smart glasses. In addition, the glasses rechargeable battery can last for more than 24 hours.
According to Professor Carlos Mastrangelo, "Our smart autofocus eyeglasses can compensate for the focusing loss of the eye so most aging individuals afflicted with far or near sightedness wearing these sets can see sharp images all the time and they are worth the price." Mastrangelo also added that his invention will be available in the market in two to three years time and may cost an estimated price from $500-$1000.