Credit: NY Times.

Dilip Vishwanat for The New York Times
Cassandra Caton watched Bruce Cook work on a mold for her prosthetic eye at Bruce Cook Prosthetics in January.
In May 2011, Cassandra Caton, an 18-year-old with honey-colored hair and the soft features of a child, suddenly went blind in her right eye. Five months later, an ophthalmologist noticed something disturbing. A large growth in the back of her eye had ripped her retina, destroying her vision.
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