Sample Abstract*

The purpose of this experiment is to determine whether smoking affects night vision in adults. It is known that rods, the part of the retina responsible for night vision, don't function as well when nicotine and carbon monoxide are present in the body. The test performed is designed to measure the night vision of each subject.

The night vision of thirty-nine smokers and non-smokers was tested. Each subject was asked to put his or her head in a large light-proof box. Three different screens with a number of small holes punched in them were placed over a hole in the front of the box. Each subject was timed in counting the number of holes they saw on each screen using two intensities of light. Averages were calculated and compared for the amount of time taken on each screen and how many dots were seen. The researcher hypothesized that the non-smokers would take less time to see more dots.

In gathering results, it was determined that the non-smokers took much less time on each screen than the smokers. The difference in how many dots were seen was statistically insignificant. For five out of six tests the non-smokers had fewer people whose times exceeded the average for all subjects. These data lead the researcher to believe that there is a definite correlation between smoking and loss of night vision.

*From DVSF, Inc.

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Questions? Contact the GPHSF Director. Last modified: 17 July 2002