Purpose: To evaluate the sterility of topical glaucoma medica- tions among chronic glaucoma users. Setting: Glaucoma service, Sanz Medical Center, Laniado Hospital, Netanya. Research mode: Prospective laboratory and clinical study. Methods: Chronic glaucoma patients were asked to submit their topical glaucoma preparations to the microbiology laboratory at Laniado Purpose: To evaluate the sterility of topical glaucoma medica- tions among chronic glaucoma users. Setting: Glaucoma service, Sanz Medical Center, Laniado Hospital, Netanya. Research mode: Prospective laboratory and clinical study. Methods: Chronic glaucoma patients were asked to submit their topical glaucoma preparations to the microbiology laboratory at Laniado