A widely used eye ointment may damage a popular implant in glaucoma patients, a new study warns. Researchers have found that oil-based ointments are absorbed into the implant material, causing it to swell and sometimes break. Implant damage only occurred when the implant directly contacted the ointment. This result was confirmed by laboratory experiments. The findings raise concerns about standard postoperative eye care. Patient cases showed damage exclusively in direct contact with the ointment.