Nonsmokers and smokers will have trouble with eye-hand coordination.”

The problem of driving while smoking is greatest at night, since carbon monoxide destroys the chemical in the eye necessary for night vision. Dr. Lawrence E. Lamb explained: “If you smoke three cigarettes in a row, night vision can decrease 25 percent.”

No wonder that it is recommended not to smoke while driving, or to allow others in the car to do so. In one extensive study, smokers were found to have twice as many auto accidents as nonsmokers.

It should not be surprising, therefore, that smoking would cut down on workers’ productivity.