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For over 40 years the standard surgical treatment for glaucoma was a procedure called a trabeculectomy.

In a trabeculectomy, the ophthalmic surgeon would make a hole in the wall of eye to allow fluid from the inside of the eye to flow out of the eye and then get resorbed by the blood vessels in the conjunctiva (the mucous membrane that covers the white part of the eye).

This surgery often resulted in a large decrease in the Intraocular Pressure (IOP). Reducing the IOP is the goal of glaucoma...

What’s up with people wearing those big sunglasses after cataract surgery?

The main reason is for protection - physical protection to assure nothing hits the eye immediately after surgery, and protection from sunlight and other bright lights.

We want to protect the eye from getting hit physically because there is a small incision in the eyeball through which the surgeon has removed the cataract and inserted a new clear lens. In most modern cataract surgeries that incision is very small - about...