Planning to have squint surgery - could taking finasteride interfere with such surgery?

You need a real consultation to determine precisely what your concern is.  The photo you put up shows no evidence of lazy eye nor evidence of ptosis which is sometimes mistaken for a "lazy eye."  A lazy eye refers to amblyopia with an eye that does not develop normal vision usually do...

Your photos indicate that you may have mild lower eyelid retraction [white showing underneath your cornea-"scleral show"].Strabismus alludes to misalignment of the eyes, or "crossed eyes", which your photos don't show.

Strabismus or "crossed eyes" is a recognized complication following blepharoplasty.  The cause can be either due to postop swelling in which case the strabismus will resolve as the edema dissipates or it can be due to direct injury to one of the extraocular eye muscles that control eye...

Your eyelid surgery is reconstructive in nature. Work with your oculoplastic surgeon to determine the best timing for you. Sounds like you have had an intense run of procedures to decompress and slow your graves disease. Good Luck,Dr Shifrin

Thank you for your question. You may want to wait a full year or longer to evaluate the surgery after all healing has occurred, or until your surgeon tells you the result is complete. Then you can be evaluated by a board certified surgeon or oculosurgeon, and you may need to go to a university...

Best to return to the eye surgeon who did Strabimus surgery. Also seek in person evaluation with a boarded eye surgeon. It is very important that the possibility of an injury to the VII facial nerve, frontal branch has occurred. But over the internet is not the place to diagnose this...