[citation][nom]bv90andy[/nom]eye pressure monitor? Surely there must be a cheaper way... an analog way.[/citation]
Yep. First we put eye drops in your eyes to dilate them, keep you in a dark room so you don't go blind, sit you in front of a big machine that puffs air at your eye and measures your eye pressure, then send you home with a neat new pair of plastic cut out shades!
Granted you would not want all that implanted in your eyeball...