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The top image shows how the light enters the eye but is blurred and distorted. The bottom image shows how a cylindrical lens can correct astigmatism.

As featured weekly on
“
Because of the context in which I encountered the profound need, I did not come away with a sense of hopelessness or fatalism. Rather, I came away with the strong sense that it was necessary for me, like the Sinha family of ophthalmologists, to take active part in fixing the problems that I had seen. Indeed, it is impossible to spend two weeks with the Sinha family without coming to understand that a single, motivated person is absolutely capable of changing the world.
”
—Emily Abrash, Unite For Sight Volunteer in India