Lump on eye

My old spaniel has a lump on his eyelid. He’s nearly 15 years old and I don’t want to put him through a GA at his age. He had a stroke earlier in the year & he’s doing well for his age. Does anyone have a suggestion of what I could do to potentially help this? 

Hello - I'm going to get some excuses in early; I'm afraid that I can't see this lump very well, although it certainly doesn't look normal.  It could perhaps be a prolapsed third eyelid if coming from the inner corner, although  when these occur for the first time late in life, they are rarely due to the patient's head-shape alone and may therefore have some underlying concern in addition.  It could also be an excess of inflammatory or other tissue on the cornea.  Other causes include cancers, polyps, foreign bodies, severe inflammatory reactions, parasites and so on.   There may also be pressure being put on the globe or brain.  In general, abnormalities of the eye are said to be emergencies, not least because of the secondary effects that pressure to the globe or pain or a disruption to the tear film can cause. Please therefore get a vet who can take responsibility for this patient to see - or at least, triage - this case as soon as possible.  They may be able to suggest what the red tissue is but they may need to offer a biopsy or - if they can't remove, repair or sample it - other possibilities may need to be explored.

Hmmm..   having reviewed your picture, Im sure that I can see a nose, making the 'lump' in the outer corner, and a prolapsed third eyelid therefore less likely.