In this photo of the interior of the Friendship 7 spacecraft, you can make out the eye chart that John Glenn was asked to read to check his vision during flight. 

Created:

April 12, 2016

Photographer:

Dane Penland

ID#:

NASM 2016-01990

Source:

Smithsonian's National Air and Space Museum

Owner:

Smithsonian Institution

Rights Usage:

Contact Smithsonian Institution

Terms of Use:

Smithsonian Terms of Use

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