As is sometimes the case, we had a rather sad outcome. Although the operation site settled down very well, the cat stopped eating and we discovered an enlarged lymphnode (gland) behind the jaw on the same side as the eye we removed. This enlarged very rapidly as was a sign that the tumour we removed was cancerous. The cat was again in discomfort and losing weight rapidly as it was not eating.
We decided not to operate again as the cancer was probably already spreading to other organs and so had to euthenase (put to sleep) the cat. At least we could prevent any further suffering but none the less this is never a nice decision to have to make.