Why are my eyes slightly yellow after blepharoplasty?

Probably not: The goal of blepharoplasty is to remove redundant skin and allow the eyes to open more readily and of course for the skin to look better. This has the effect, among these options, of exposing the whites of the eyes more openly. You probably had eyes this yellow before but they were obscured by the redundant skin which is now out of the way and you can see the yellow more readily.

Temporary: After eyelid surgery like any surgeries, you can have some amount of blood sippage in surounding tissues. On the sclera ( white part of the eyeball) this blood can look red at first then gradually turn to green and yellow before completely dissipating. The same thing happens under the skin so the color that you see is temporary and should gradually fade out.

Could be swelling: It is not uncommon after eye and eyelid surgery to get swelling under the "skin" of the eye, the conjunctiva. This is called chemosis and appears yellow due to the blood products in it. This will resolve with time, just like the adjacent bruises.

Bruising: As the bruising breaks down around the eyelid, the pigment of the bruise can change from a dark purple to a green to a slightly yellow appearance. This bruising can even track into the "white" of the eye. If it looks swollen, then it may be a fluid collection called chemosis. If so, this can last for several weeks or more. Talk to your doctor if does not go away after the first couple weeks.