Before having your blepharoplasty treatment, it is advisable not to be on Botox. Botox for crows feet needs to be injected into the orbicularis oculi muscles.
Your surgeon will need to treat the eyelid area by making decisions based on the natural state of the muscles and tissue around the eyes.
Relaxing these muscles through the use of Botox may inpact the ability of the surgeon to make the right decisions in correcting the eyelid tissue
Web reference: http://www.finetouchdermatology.com/los-angeles-botox/