Read the article link below, not only it stops the degeneration of the hereditary blindess but now there is a "cure" not by major eye operations but by injection. Currently there are tablet medications or eye operation like the Las Vegas icon did. Some parents felt guilty when their kids and other siblings are diagnosed with the degenerative eye blindness, but now may be sooner that you can talk to your kids the cure is just around the corner.

http://www.dailymail.co.uk/health/article-2040789/Jab-heal-blind-Stem-cell-trial-brings-hope-millions.html?ito=feeds-newsxml