When Can I Have Blepharoplasty After Being off Accutane?

Accutane should typically not interfere with the surgeries you are contemplating after a period of 6 months to one year.
The main reason Accutane is dangerous is for laser resurfacing; the laser is very prone to burning the skin of patients who have recently undergone Accutane. The pilosebaceous units have been dried up from laser and the heat from the laser tends to be absorbed by other adjacent tissues, causing burns.
Accutane may also inhibit reepithelialization. Better to wait six months before your proposed surgeries to be safe.

Accutane inhibits epithelialization by suppressing adnexal structures. Thus, invasive surgeries are contraindicated during Accutane therapy. I regularly manage patients requesting surgery while on Accutane.
I advise patients to wait 6 months after cessation of any amount of Accutane before undergoing any surgery. Thus, the ability to heal will be re-established.
This holds true, especially for blepharoplasty and rhinoplasty, two very important parts of the face.