<prompt> Cavernous sinus thrombosis following sinusitis results in all of the following signs except:Constricted pupil in response to lightEngorgement of retinal veins upon ophthalmoscopic examinationPtosis of eyelidOphthalmoplegia  <response>: Ptosis and ophthalmoplegia occur in cavernous sinus thrombosis due to involvement of III and IV and V cranial nerves. Retinal vessels are also engorged but pupils are fixed and dilated,due to involvement of III nerve and sympathetic plexus. Ref Dhingra 5e,p 214. 