We commend the efforts of Choudhari et al. to improve teleophthalmology in glaucoma [1]. It is not just rural, underserved areas that can benefit from such progress. Given the COVID-19 pandemic and the mounting pressures on NHS ophthalmology services, novel ways to reduce in-person hospital attendances are needed in all settings.

At present the treatment for all types of glaucoma aims to lower intraocular pressure (IOP). IOP is typically measured using a Goldmann Applanation Tonometer (GAT) in the clinic setting. The iCare tonometer (iCare, Finland) is a rebound tonometer that has similar accuracy to GAT and can be used by the patient at home [2]. Pronin et al found that 73% of patients could successfully perform self-tonometry with an iCare HOME Tonometer [3].

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