Eye "Filter" ~$10k
A trabeculectomy or "trab" is a controlled leak, of sorts, or a filter. It involves making a drainage route of fluid from inside to outside the eye
The outside of the eye being a bleb or bump of elevated conjunctiva usually seen above the iris after the surgery. In this way, the pressure inside the is lowere. The total cost of the surgery without surgery is likely around $10, 000.