As for eye drops to cure cataract, attempts have been made by biochemists since the 1980s.　In this area, very remarkable achievements have been made.

One such eye drop, which was highly successful experimentally, was developed at Kitasato University by Sato Pharmaceuticals in Japan, and patented in 1992, but was then mysteriously dropped. Another, developed in Egypt and internationally patented around 1996, has actually been used to reverse cataract without surgery in Egypt and Saudi Arabia for the last 20 years, and is still used there. Yet another, developed jointly by a British and a Russian biochemist, even went on sale at UK chemists' shops around 2000, but was pulled off the shelves after complaints by a large London eye hospital that “such a simple method as eye drops couldn’t possibly work”. In fact, it is quite effective for cortical cataract and is now widely available on the Internet. Then there's the UK cataract surgeon who, in 2003, admitted that lutein eyedrops cured his own cataracts and saved his own sight, but then went on to do thousands more surgeries without telling his patients about that alternative. Unfortunately, lutein eyedrops are no longer available. And as usual, the eye profession - the only body authorized to test and approve any method of treatment - chose not to investigate, again in stark denial of their responsibility, preferring to continue to rely solely on surgery all the time and expose patients to unnecessary risk.
http://www.positivehealth.com/article/vision-and-eye-sight/cataracts-when-a-miracle-of-modern-surgery-wasn-t-needed

They mean Russian Can C but what is this?
Another, developed in Egypt and internationally patented around 1996, has actually been used to reverse cataract without surgery in Egypt and Saudi Arabia for the last 20 years, and is still used there.
http://www.positivehealth.com/article/vision-and-eye-sight/cataracts-when-a-miracle-of-modern-surgery-wasn-t-needed