Evaluation of YouTube videos as a patient information source on intravitreal injection procedures.PURPOSE
 To evaluate the content, reception and quality of YouTube videos on intravitreal injection (IVI) procedures as an educational resource for patients.


 The terms "intravitreal injection," "intravitreal injection treatment," "eye injection," "eye injection treatment," "dexamethasone intraocular injection," "anti-VEGF injection," "Ozurdex®," "Lucentis®," and "Eylea®" were searched on YouTube.  Video publishers were as follows: 31 (27.9%) private hospital YouTube channels, 17 (15.3%) ophthalmologists, 45 (40.5%) health-related YouTube channels, 18 (16.2%) "other channels."  This study showed that YouTube videos on IVIs contain moderately useful information for patients.  YouTube videos may be helpful for patients seeking information about IVIs, but physicians must be careful to correct any misunderstandings.
YouTube
Quality and reliability of video content was assessed using the DISCERN questionnaire, Journal of the American Medical Association (JAMA) score, and the Global Quality Score (GQS). 
DISCERN questionnaire
The DISCERN, GQS and JAMA scores were correlated (P = 0.001). 
JAMA score
Quality and reliability of video content was assessed using the DISCERN questionnaire, Journal of the American Medical Association (JAMA) score, and the Global Quality Score (GQS). 
Global Quality Score (GQS)
The video power index (VPI) was used to determine the popularity of the videos.



video power index (VPI)