topical prostaglandin eyedrop: a treatment for glaucoma; the eyedrops increase the outflow of aqueous humor through the uveoscleral pathway
eyedrop: a method of irrigating the eye used by ophthalmologists
iron curtain: an impenetrable barrier to communication or information especially as imposed by rigid censorship and secrecy; used by Winston Churchill in 1946 to describe the demarcation between democratic and communist countries