Use of a smartphone-based, non-mydriatic fundus camera for patients with red flag ophthalmic presentations in a rural general practice.

Abstract

Introduction Fundus examination by direct ophthalmoscopy is widely used in general practice; however, it offers limited field of view, requires close approximation to the patient, has a steep learning curve and is a difficult skill to master and maintain. Non-mydriatic fundus photography (NMFP) offers an alternative with a wider field of view, ability for image analysis and transmission, and is able to be conducted by allied healthcare staff. Aim This study aimed to compare the use of direct ophthalmoscopy with smart-phone NMFP in a large rural general practice. It also aimed to analyse the number of adequate views and positive findings achieved with each instrument and the impact of NMFP on ophthalmology referral decisions. Methods Patients aged ≥16 years presenting to Dargaville Medical Centre (Dargaville, New Zealand) with visual disturbance, headache, hypertensive urgency (systolic blood pressure (BP) >200 mmHg or diastolic BP >120 mmHg), transient ischemic attack (TIA) or stroke were enrolled prospectively into an observational study of visualisation, diagnosis and management impact for a 1-year period (n = 152, 304 eyes). Direct ophthalmoscopy findings and management plans were documented by the attending general practitioner (GP), and then again following assessment of the NMFP. Results NMFP significantly improved visualisation of the fundal structures with an increase in adequate views achieved of both the optic disc and the retina. Inter-rater agreement between the referring GP and ophthalmologist was good. Discussion The use of NMFP in general practice might result in greater accuracy in diagnosing retina and optic disc disease. Routine transmission of NMFP images to specialist eye clinics as part of the referral might improve management and result in health system efficiencies.