night vision

http://www.guardian.co.uk/international/story/0,3604,1255438,00.html The paper: E. B. Russo, A. Merzouki, J. Molero Mesa, K. A. Frey and P. J. Bach (2004) Cannabis improves night vision: a case study of dark adaptometry and scotopic sensitivity in kif smokers of the Rif mountains of northern...