This study published in Ophthalmic Research aimed to determine the effect of chronic smoking on the pupil and photostress recovery time.
40 heavy smokers and 40 age- and sex-matched nonsmokers had full vision and no ocular problems. Photostress recovery times were similar in smokers and nonsmokers. Scotopic pupil sizes in smokers were similar; however, photopic pupil size in smokers was different from nonsmokers.
Conclusions: Chronic smoking may dilate the pupil, and increases macular foveal threshold value immediately after photostress.