<prompt> A 40 year old male with diabetes presents with vitreous hemorrhage. What is the cause?Posterior retinal detachmentNeovascularization at discCentral retinal vein occlusionTrauma to central retinal aery  <response>: Neovascularization, defined as abnormal formation of blood vessels in the retina, is a sight-threatening condition indicative of late-stage diabetic retinopathy DR. ...Neovascularization on the disc NVD is diagnosed when new vessels are located within one disc-diameter of the optic disc. Ref AK khurana 6e p 278 