Abstract
Purpose :
To evaluate the diagnostic capacity (sensitivity and specificity) of the non-mydriatic DRS camera in diabetic retinopathy, age-related macular degeneration, cataracts and suspect glaucoma. We will perform a retrospective analysis of the images taken with the non-mydriatic DRS camera during 2019 to determine their sensitivity and specificity in the diagnosis of the aforementioned pathologies.
Methods :
Retrospective, cross-sectional, observational, descriptive study. In which, through the use of the DRS camera, clinical photographs were taken of 250 patients who attended the consultation for the first time at the "Asociacion para evitar la Ceguera" in Mexico in 2019. 3 clinical photographs were taken per eye of each patient. By observing clinical images, an expert diagnoses the pahtology for each case, as well as the stage of the disease according to international classifications. Data were collected from clinical records to obtain diagnoses using gold standard methods for each pathology.
Results :
221 eyes were obtained that met the diagnostic criteria for the three pathologies analyzed, which were divided into 59 eyes for glaucoma suspect, 60 for age-related macular degeneration (AMD) and 102 for diabetic retinopathy (DR). The DRS showed a sensitivity for suspected glaucoma of 75% and a specificity of 55.9%. For AMD, the presence of AMD vs non-AMD showed a sensitivity of 87.5% and specificity of 65.2%. Similarly, AMD no advance vs AMD advance, there was a sensitivity of 96.2% and a specificity of 46.4%. Regarding DR, the presence of DR vs the absence of DR, DRS showed a sensitivity of 88.9% and a specificity of 89%. Comparing non-proliferative DR vs proliferative DR, a sensitivity of 98.3% and a specificity of 70% was obtained.
Conclusions :
The DRS is a useful tool for screening suspected glaucoma, DR and AMD as it has a high sensitivity; however, it does not replace the gold standard of the clinical ophthalmologist, since in none of the previously mentioned pathologies it showed a considerable specificity. However, in a country like Mexico, where many parts of the country do not have an ophthalmologist, DRS has proven to be useful for the screening and referral of patients with suspected glaucoma, DR and AMD.
This abstract was presented at the 2024 ARVO Annual Meeting, held in Seattle, WA, May 5-9, 2024.