Pars plana vitrectomy is a type of microsurgical technique performed on the eye that enables surgeons to carry out a number of different surgical procedures involving the back portion of the eye. In this procedure, the vitreous gel that fills the back of the eye is removed, allowing surgeons to perform surgery on the retina or posterior region of the eye.
Jameson, J. Larry, et al. Harrison's Principles of Internal Medicine, 20th Ed. New York: McGraw-Hill Education, 2018.