<qa>  What is the name of the study participants who will be recruited from patients attending the OphthalmStudy participants will be recruited from patients attending the Ophthalmology Department Outpatients Clinic at St Thomas Hospital, London, United Kingdom who have a diagnosis of glaucoma or OHT ocular hypertension requiring glaucoma drainage surgery. One hundred patients with glaucoma or OHT and where a clinical decision has been made that they need glaucoma surgery will be included in the study such that 100 eyes undergoing surgery will be included together with the contra-lateral untreated eyes that will be used as controls for comparison with the treated eyes. 