Background/aims: Although optometrists have become an accepted part of the team in many hospital glaucoma clinics, their decision making ability has not been assessed formally. This study aims to document the accuracy and safety of clinical work undertaken by optometrists in the hospital setting by investigating their management decisions on follow up of patients with glaucoma. Methods: Four optometrists and three medical clinicians examined 50 patients each. Clinical findings were recorded as usual in the hospital records but management decisions were documented separately on a specially designed data collection form. Subsequently, the patient records and clinical findings were reviewed retrospectively and independently by two consultant ophthalmologists, who were masked to the management decisions of the optometrists and medical clinicians. The consultants' management decisions were then compared with those made by the optometrists and medical clinicians. Percentage agreements were computed together with kappa (k), or weighted kappa, statistics where appropriate. Results: Agreement between consultants and optometrists was 55% (k = 0.33) for evaluation of visual field status, 79% (k = 0.67) for medical management, 72-98% for other aspects of patient management, and 78% (weighted k = 0.35) for scheduling of next clinic appointment. Very similar levels of agreement were found between consultants and medical clinicians. Conclusion: Agreement between optometrists and consultants, in glaucoma clinical decision making, was at least as good as that between medical clinicians and consultants. Within an appropriate environment, optometrists can safely work as part of the hospital glaucoma team in outpatient clinics.T he number of potential glaucoma sufferers is estimated to increase by about a third over the next 20 years.1 This has raised concerns about the personnel and financial resources required to provide a good standard of clinical care. One means of alleviating the burden on the hospital eye service is to involve non-medical eye care professionals, such as optometrists. Community optometrists already play a key part in the detection of glaucoma in the United Kingdom. They are responsible for more than 95% of glaucoma referrals to the hospital eye service and have the basic skills to detect glaucoma.2 Furthermore, optometrists are becoming increasingly involved in co-managed/shared care schemes and studies have been designed to assess their involvement. [3][4][5][6][7] Studies to date have examined the agreement between ophthalmologists and optometrists regarding individual aspects of the clinical examination-for example, optic disc and intraocular pressure assessment, [8][9][10][11] but, to our knowledge, not that regarding decision making for the management of glaucoma patients.This study was designed to evaluate this agreement between optometrists and two glaucoma subspecialist consultant ophthalmologists. As a benchmark, the same evaluation of agreement was undertaken for medical clinicians (associate special...