Abstract Background: Due to high prevalence of vitrectomy surgery. and the importance of anesthetic technique in conducting an uncomplicated surgery. we decided to do this study. Materials and Methods: This prospective randomized study was conducted on 80 patients 40-80 years old candidating deep vitrectomy sugery under general anesthesia that were categorized into II and III Class by... https://www.silkmarketbeijing.com/product-category/nails/