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Cigarette Smoking and Risk for Progression of Nuclear Opacities
Sheila West, PhD;
Beatriz Muñoz, MS;
Oliver D. Schein, MD;
Susan Vitale, MHS;
Maureen Maguire, PhD;
Hugh R. Taylor, MD;
Neil M. Bressler, MD
Arch Ophthalmol. 1995;113(11):1377-1380.
Abstract
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Objective
To examine the relationships between smoking and the 5-year incidence of new nuclear opacities and between smoking and the progression of nuclear opacities in a prospective study of a cohort of Chesapeake Bay watermen.
Methods
A total of 442 men (age,  30 years in 1985) with paired, gradable lens photographs in at least one eye in both 1985 and 1990 were studied. Photographs were graded by two readers who used the grading scheme of the Wilmer Institute, Baltimore, Md, with severity ranging in decimal units between 0.0 and 4.0. Data on the smoking history of the subjects were collected by personal interviews that were conducted in 1985 and updated in 1990.
Results
The incidence and progression of opacities increased with age. A nonsignificant association was observed between smoking (for both current and exsmokers) and the incidence of a nuclear opacity. The risk of progression of nuclear opacities of less than grade 3 at baseline to grade 3 or worse was 2.4-fold higher among current smokers in 1985, compared with that among exsmokers and nonsmokers (95% confidence limits: 1.0, 6.0) after adjustment for age, baseline opacity status, and alcohol use. An 18% increased risk of progression was significantly associated with each pack-year that a subject smoked between 1985 and 1990.
Conclusion
These data confirm previous findings that smoking is associated with a nuclear opacity, particularly with progression to severe opacities.
Author Affiliations
From the Dana Center for Preventive Ophthalmology, Wilmer Institute, The Johns Hopkins University, Baltimore, Md (Drs West, Schein, Maguire, and Bressler and Mss Muñoz and Vitale), and the Department of Ophthalmology, University of Melbourne (Australia), Royal Victorian Eye and Ear Hospital (Dr Taylor).
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