If I get fillers underneath my eyes, will it affect my lazy eye and make it worse?

Thank you for your question. I don't believe tear trough filler will affect you lazy eye. A lazy eye is nerve-related. Filler will only add volume to the area. Be sure to visit a skilled and qualified injector. 

Filler into the tear trough will not have any effect on a lazy eye.  A lazy eye is due to issues related to the levator mechanism of the upper eyelids.  Filling the lower eyelid may help with the slight laxity of the skin of the lower eyelid however, you may want to ask about minimally invasive procedures such as microneedling, fractionated Erbium laser, or chemical peels to address skin rejuvenation in the thin lower eyelid skin

Thank you for your question. A lazy eye is something that is nerve-related, which injectable fillers will not affect. However, I recommend that you schedule a consultation with a board-certified plastic surgeon who is experienced in injectable fillers. They can examine you and offer options for the right filler, as well as any other treatment that can address your tear trough issues as well as possibly diminishing the look of your lazy eye. Good luck!