Comparison of Glaucoma Diagnosis by Telemedicine, In-Person Ophthalmologist and Optometrist.

Abstract

Diagnosis of glaucoma via telemedicine demonstrates moderate agreement with in-person ophthalmologist and optometrist diagnosis, providing evidence that telemedicine is a timely, accurate screening method in settings where an in-person visit may not be feasible. To compare diagnostic agreement of glaucoma between in-person ophthalmologist (MD), in-person optometrist (OD), and a simulated telemedicine program. Cross-sectional study of patients with normal optic nerve structural and functional imaging and new patients referred for glaucoma evaluation examined in-person by an MD for glaucoma with a dilated exam and structural and functional optic nerve testing (optical coherence tomography (OCT)), photos, and visual field); examined in person by an OD with a dilated exam and optic nerve testing; and structural and functional optic nerve testing reviewed separately by two ophthalmologists (TMD1, TMD2) with masking of prior MD and OD diagnoses. Inter-rater agreement between each diagnostic method (MD, OD, TMD1, TMD2) of normal vs. disease (open angle glaucoma, normal tension glaucoma, other type of glaucoma, other optic nerve disorders, ocular hypertension, glaucoma suspect) for each eye was calculated (Cohen's unweighted kappa). A total of 100 patients with median age of 66 years (IQR 59-72), male (40%) and White (62%) were analyzed. There was moderate agreement between MD and telemedicine [TMD1 kappa 0.49 (95% CI 0.37-0.61), TMD2 kappa 0.44 (95% CI 0.32-0.56)] and between MD and OD diagnosis [0.41 (95% CI 0.28-0.54)] and fair-moderate agreement between OD and telemedicine (TMD1 0.46 (95% CI 0.34-0.58), TMD2 0.61 (95% CI 0.50-0.72)]. The simulated telemedicine approach had comparable levels of agreement in glaucoma diagnosis with in-person fellowship-trained ophthalmologist, presenting a crucial complementary role in screening and increasing access to care, particularly in rural or underserved settings.