  As the world's population ages, cataract-induced visual dysfunction and
blindness is on the increase. This is a significant global problem. The most
common symptoms of cataracts are glared and blurred vision. Usually, people
with cataract have trouble seeing or reading at distance or in low light and
also their color perception is altered. Furthermore, cataract is a sneaky
disease as it is usually a very slow but progressive process, which creates
adaptation so that patients find it difficult to recognize. Moreover, for the
doctors it can be very difficult to explain and give comprehensive answers to
the patients' symptoms. We built and tested an optic device that uses egg
albumen to mimic the optical degradation of the crystalline related cataracts
and that is able to visualize how the cataract impairs vision. At best of our
knowledge, it is the first experimental system developed at this aim. This can
be a valuable tool, which can be of help in education for students in medical
sciences as well as to provide a method to illustrate the patients how their
vision is affected by cataract progression process.
