Ophthalmology

T. P. O'Brien and M. F. Goldberg
Wilmer Eye Institute, Baltimore, Md.

It is estimated that 49% to 74% of cases of contact lens-associated ulcerative keratitis could be prevented by eliminating overnight wear. Heavy alcohol consumption appears to be associated with all types of cataracts. Cigarette smokers have a nearly threefold greater risk of developing age-related macular degeneration than nonsmokers.