All the following signs could result from infection within the right cavernous sinus except -

In CST, there is loss of direct and consensual light reflex on the same side. So, there will be no pupillary constriction in response to light. Retinal veins are engorged and congested in later stages. Ptosis (due to 3rd nerve involvement) and opthalmoplegia (due to 3rd, 4th, 6th nerve involvement) occur in CST.