How do you clean crusty drainage after a vitrectomy surgery?

Ask retinal surgeon: There should not be a lot of drainage after vitrectomy, and this could be a sign of infection or leakage (rare). So, ask your surgeon about this. Sometimes crusting can also be a residue of postoperative eye drops. Usually a warm compress to the eyelids and gentle cleaning of the external lids can loosen and remove debris. This debris can also harbor bacteria, so it is good to remove it.