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Vision
Eye
Light
Sense Organs
Three-Dimensional Image
animal vision
astronaut requirements
brain’s involvement in vision
color vision
Columbus’s failing eyesight
correction of vision disorders
disorders affecting vision
dream state
effects of aging
medieval idea about vision
perceptions
physiological changes
pictures related to vision
quotations
research and study
units of measure
visual impairments
Astronaut
Astronaut, crew member on piloted spaceflights. The term astronaut comes from the Latin words astrum (“star”) and nauta (“mariner”) and is used mostly...
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