system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
All the following signs could result from infection within the right cavernous sinus except -
assistant
The correct answer is  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.