The CDC is investigating recalled eyedrops after infections cause death and blindness

Pseudomonas aeruginosa bacteria as seen under a microscope. The Centers for Disease Control and Prevention says 68 people have become infected with a drug-resistant strain of the bacteria, with many infections linked to the use of contaminated eye drops. (Janice Haney Carr/AP)

The U.S. Centers for Disease Control and Prevention says it's investigating a drug-resistant strain of bacteria that caused severe injuries in 68 patients, including three deaths, across the U.S.

The CDC says most of the patients infected with Pseudomonas aeruginosa reported using artificial tears or eyedrops.