https://www.vetsurgeon.org/f/clinical-questions/25269/guinea-pig-eyes Hi all, Harry is a 4yo ME Guinea Pig. In September, when he was in for another reason, it was noted that he had developed what looked like bilateral cataracts, L&gt;R. Today he was in and his eyes looked like this: The left eye is protruding quiteen-USTelligent Community 10https://www.vetsurgeon.org/thread/171903?ContentTypeID=1Mon, 09 Jan 2017 09:23:29 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:e6e310c4-ddd7-4ca6-a9ce-18bb1272e15eKMurphy<p>Wonderful, thank you very much. &nbsp;I&#39;ve never heard of this before, to be honest, so I&#39;m very grateful for the information!</p><div style="clear:both;"></div>https://www.vetsurgeon.org/thread/171866?ContentTypeID=1Sun, 08 Jan 2017 10:55:39 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:ca71bcd9-9f34-414d-863b-23dabe8a16eegrumpyoldman<p>They are probably choriostoma/osteomas . You can measure the IOP, the clients usually bring them in in pairs, so you can use the normal one as a comparison, It can get upto 80 mm of Hg without appearing to cause them a problem.There is a conversion factor you can use in Rabbits that takes into account the different radius of curvature of the cornea. Seems to just sit there for ages without problems and as long as you leave them with their friend they do not seem affected by it. Hard to say whether NSAIDS would help as the glaucoma is so slowly progressive they seems to adapt to it. &nbsp; Its usually bilateral but one side is more advanced than the other. Probably just monitor unless it looses weight or ulcerates. You can enucleate if it gets painful and unpleasant. You can also X-ray them as the globes are mineralised and much more radio dense than normal. &nbsp;Seen lots with GP rescue .Not seen any mets or further developments.Do not seem to go to N-stage pthisis post glaucoma in the same way dogs or cats do ,not sure why though. &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</p><div style="clear:both;"></div>