“As a boy”

July 15, 2015 | 1

In 2002, David Friedman thought of a question he wanted to ask Oliver Sacks, on the topic of 3D glasses and “pseudoscopic” vision. A week after he sent the letter, he received a typewritten reply, complete with diagrams. At The Morning News, a copy of the letter he received, along with background.

is a staff writer for The Millions. He lives in New York.

One comment:

  1. Gained stereoscopic vision at 40? Huh. I don’t know what I’d do with stereoscopic vision. Given how much painting and photography is in my life, it may not be an advantage to achieve it.

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