Abstract 147: The diagnostic accuracy of portable, non-contact, handheld retinal camera in screening diabetic retinopathy

Abstract

Background: Hand-held retinal camera (HRC) is a portable device which require less expertise and training with less image acquisition time in identifying diabetic retinopathy (DR).Aims and Objectives: To find out the diagnostic accuracy of HRC in identifying DR in comparison to the table top fundus camera (TTFC).Materials and Methods: Adults with diabetes mellitus irrespective of the type and duration, attending the ophthalmology clinic were randomly selected and initially subjected to retinal photography with TTFC on a dilated eye individually by an expert ophthalmologist followed by retinal photography with HRC by a trained resident. The best images of both the devices were graded by ophthalmologist according to the ETDRS classification with proper blinding of the photographs.Results: 101 subjects (191 eyes) with mean age of 56.86 + 10.75 years were evaluated. 45 eyes with Non Proliferative DR (NPDR) and 1 eye with Proliferative DR (PDR) were diagnosed with TTFC among which HRC identified retinopathy in 34 eyes (33 NPDR & 1 PDR). All 19 cases of Diabetic Macular edema (DME) were identified by HRC. HRC had sensitivity and specificity of 79.9% and 99.3% in diagnosing DR with a positive predictive value of 97.1%.Conclusion: HRC using mydriasis has good diagnostic accuracy in preliminary DR screening.