A technique and device for relieving intraocular pressure with a reduced risk of inflammation that may be caused by retrograde flow back into the eye. A unidirectional drainage device is implanted which allows fluid to flow away from the eye with a minimal pressure gradient (5 mm Hg. or less), and includes...http://www.google.fr/patents/US5326345?utm_source=gb-gplus-shareBrevet US5326345 - Eye filtration prostheses
