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Review of Wartime Studies of Dark Adaptation, Night Vision Tests, and Related Topics (1949) / Chapter Skim
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Some Comments on Night Vision Selection Tests and Procedures
Pages 7-9

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From page 8...
... Seeing at night is >bably also dependent upon a variety of non-visual psychological and physiological factors, such fatigue, motivation, nutrition, situational variables and possibly others which we have not conered involved. Visual acuity, contrast sensitivity, absolute sensitivity, and movement sensiLty of all parts of the retina, which have not yet been convincingly demonstrated as co-varying,2 isumably contribute to night seeing, as do ocular tremor and habitual eye-movement patterns.
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