You are looking at a special eye wear from Adlens which checks the need of different glasses for a particular person with time.This is because the Adlens lenses can be adjusted to a varying range of power with a turn of a dial fitted to the glasses. So how does it work? The lens is actually a hollow chamber filled with a high refractive index liquid and fitted with a clear and rigid plastic membrane.Turning of the specified dial controls the amount of liquid that can be let inside the chamber bounded by the lens and the membrane.
As the fluid fills in, the curvature of the plastic membrane gets modified allowing a range of powers to get accommodated in a single eye wear. If more curvature is required more fluid is let in and vice versa. Thus “one lens can work for thousands of different prescription combination.” Although the fluid filled Adlens glasses are still in research stage, you might be interested in two products called Adlens Universals and Adlens Readers which have been used in developing nations with success. With over 1 billion people in developing nations in need of eyeglasses the fluid filled glasses is a solution indeed.
“James Chen and Oxford University Professor Josh Silver founded Adlens in 2004.” It is based in Oxford, United Kingdom.
Check out the video below to see how the Adlens products work and how have they been helpful to people. For more information visit adlens.com.
[source : adlens.com]