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Download Generated Topic:A Chronic Impairment of Colour Vision in Users of LSDHPPD Research Articles


David S. Kozin
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File Name: A Chronic Impairment of Colour Vision in Users of LSD

File Submitter: David S. Kozin

File Submitted: 27 Oct 2010

File Category: HPPD Research Articles

A Chronic Impairment of Colour Vision in Users of LSD

HENRY DAVID ABRAHAM

Summary: Forty-six users of the hallucinogen lysergic acid diethylamide were

compared with 31 controlson a testof colour discriminationan average of two

years after their last exposure to the drug. Controls performed better than users,

and LSD users without flashbacks performed better than users with flashbacks.

An analysis of variance between the three groups was significant at P <0.001.

This study suggests that some users of LSD may have a sustained or irreversible

impairment in colour discrimination.

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