A McMaster PhD candidate has harnessed a component naturally found in tears to develop a contact lens-based drug delivery system for glaucoma patients. Chemical engineer Myrto Korogiannaki has used hyaluronic acid to help get drugs to the eye from a lens in a controlled way. Patients with front-of-the-eye diseases, such as glaucoma, traditionally use medicated eye drops twice a day to treat their ailment. But those drops are incredibly inefficient as only about five per cent of the drug they car...