A prism bends a beam of yellow light, but separates the illusion of yellow light generated by adding red and green. ... Found on http://en.wikipedia.org/wiki/Timoptic
(ti-mop´tik) trademark for a preparation of timolol maleate, a beta-adrenergic blocking agent used in treatment of glaucoma and ocular hypertension. Found on http://www.encyclo.co.uk/local/21001