ORIGINAL AIRDATE: May 6th, 1991 ---
Pete schedules surgery for his glaucoma and MacGyver shows up to relive the past.
MISSION: MacGvyer and Pete embark on the lamest clip show thus far. Pete is prepped for surgery and MacGyver is offended he didn't get an invite.
This week's highlights include:

Trebeculectomy (Medical)

Trabeculectomy is a surgical procedure used in the treatment of glaucoma to relieve intraocular pressure by removing part of the eye's trabecular meshwork and adjacent structures. It is the most common glaucoma surgery performed and allows drainage of aqueous humor from within the eye to underneath the conjunctiva where it is absorbed. This outpatient procedure was most commonly performed under monitored anesthesia care using a retrobulbar block or peribulbar block or a combination of topical and subtenon (Tenon's capsule) anesthesia. Due to the higher risks associated with bulbar blocks, topical analgesia with mild sedation is becoming more common. Rarely general anesthesia will be used, in patients with an inability to cooperate during surgery.

Check out the article on wikipedia: https://en.wikipedia.org/wiki/Trabeculectomy.

Watch S6E21: "Hind-Sight" on CBS's website or check the alternative streamability of this episode here.