Eye cosmetic samples (428) from 235 women were cultured for bacteria and fungi. Contamination was noted in 12% (fungal) and 43% (bacterial) of the samples. Cultures from the outer eye of women with contaminated cosmetics yielded the same organism in a significant number of cases. In one instance, the mascara of a woman with keratomycosis due to Fusarium solani yielded the same fungus and in five of six women with pseudomonas-contaminated cosmetics, pseudomonas was isolated from the outer eye. New cosmetic samples were essentially free of microbial contamination. Representative fungal isolates were shown to assimilate cosmetic components such as paraffin oil, petroleum, and isopropyl myristate. This study demonstrates that bacteria and fungi may contaminate eye makeup, presenting a potential hazard of ocular infection.