'Mini-gauge' pars plana vitrectomy: 'inside-out view' with the GRIN solid rod endoscope.

Purpose: To stimulate the discussion about 'mini-gauge' pars plana vitrectomy.

Methods: Gradient index high-resolution endoscopy to analyze the 23- or 25-gauge access into the vitreous cavity. A total number of 66 pars plana interventions (almost 200 cannulas) were performed and recorded with the gradient index solid rod endoscope as well as through the microscope.