I've always been curious if you go blind in one eye will you automatically go blind in the other eye and what determines that factor if it is true or not
As we would say in good ol ' India... Tussi great ho! You are great Dr Lee...Not only do you have a very logical and sharp thinking, but you choose to share it with us and teach with so much passion!
why am I looking at the other eye to diagnose 3rd nerve palsy it lost the consensual reflex isn't that enough? Also, if the other "normal" eye is constricted when light is at it and then dilated that is the normal becuase this is the normal reaction to the eye when light is directed toward it (constriction of pupil) then light is fading away (dilating).
you check (shine a light ) the other eye (the one that you know has a 3rd nerve palsy to make sure that the is also not an afferent (2nd nerve) lesion. If there is an RAPD (in this case determined by a dilating or failure to constrict of the normal eye) you now know that the eye with the 3rd nerve palsy also has a 2nd nerve palsy
@@jojoplacide Thanks for confirming my understandings. I think that is the main topic of this video btw... why we need reverse RAPD -> to find 2nd CN problem in 3rd CN problem pt -> orbital image on top of the brain image.(orbital apex lesion).
