https://www.vetsurgeon.org/f/clinical-questions/10928/opposite-of-third-eyelid-prolapse Hi, I saw a cat last week with discharge (epiphora/crusting) from one eye and I could not prolapse the 3rd eyelid with pressure on the skin above the eye. 1 week of fucithalmic has improved the discharge but now there is an ipsilateral mucoid nasalen-USTelligent Community 10https://www.vetsurgeon.org/thread/56968?ContentTypeID=1Fri, 02 Mar 2012 14:34:41 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:cd1c6617-1c82-4fed-b9eb-d328aa3ed2ffSarah Wheadon<p>Definitely sounds like increased retrobulbar pressure. Could be neoplastic or abscess/inflammatory.&nbsp; Try anaesthetising and looking in the mouth to see if any sign of swelling/inflammation around or just caudal to upper molar. If there is, try exploring with a blunt probe. Very satisfying if you get a release of pus. Ultrasound can also be useful in these cases. </p><div style="clear:both;"></div>