@LizHatch sorry the news wasn't more positive
A few things are bothering me with the vets visit though..
How did the vet diagnose the tumour?
What tests did they do?
What medicine did they prescribe for the infection - was it antibiotic eye drops? Or oral medication?
How long did the vet think it would take to find out if an operation might be needed- is it the week?
Did the vet have experience with Guineas?
I don't want to give false hope, but here's a picture of my Tiggy, her eye came up like this within 24hrs
It looks similar to your gorgeous little man?
I gave Tiggy eye drops twice a day for 4 days & within 24hrs her eye looked like this
I'm afraid I can't remember which eye drops were used, probably either Tiacil or Clinigel as my old girl Orca is the queen of eye issues & we have a repeat prescription for either of these as she gets through so much!
I think Tiggy also had a weeks dose of Baytril twice daily too, to help with any infection.
She's never had any problems since (these photos taken in August 2019) her eyes look completely normal now.
Also Squiggle had a slightly different issue with her eye but the treatment was the same & she recovered within a few days too
I'd hate for you to go ahead with any surgery if not necessary
Check that your vet is experienced & competent on operating on guineas before giving the go ahead, also ask about post op care & see what they come back with.
Maybe even ask for a second opinion or book in with a different vet at the same practice, so it's not obvious your looking for alternative options.
Whatever you decide don't rush into surgery, without exploring other options first.
Healing vibes being sent your way & let us know how he gets on.
Xx