Can Botox Be Used to Change the Shape of my Eyes?

If we are talking about the eyelid margin, then no.  To alter the shape of the eye, surgery is needed.  The most common form of this is ptosis surgery and canthal surgery.  Fillers have been used to fill the lower eyelid in an effort to push up a lower eyelid and this can change the eyelid contour.  Please be careful what you look for out there.

Changing the shape of the eyes can be done in multiple ways. Both surgical and nonsurgical techniques can be used. In office procedures like botox and fillers (Juvederm, Restylane, Volbella, Vollure) can be used for subtle non-surgical changes. Surgery such as lateral canthoplasty can be used to make the eyes more defined, almond shaped or slanted. Its important to seek out an experienced oculoplastic specialist to discuss your options. 

By injecting in the lower lid a small amount of Botox, you can loosen up the lid and make the eye look more rounded. You want the other effect, which you might be able to achieve by injecting filler in the upper cheek or tear trough area.  However, it might look asymetric with unilateral filler, so be careful.  

Hi

Botox can change the look of the eyes by elevating and arching or lowering and flattening eyebrows.  It can open up squinting eyes. It can make a narrow squinting eye look more round and open.  But the shape of the eyes is not just muscle and skin and its related to the bony orbit, the fat and soft tissue as well as attachment of eyelid muscles and canthal tendons which cannot be changes with Botox.  

Botox will improve the shape of your eyebrow but it will not change the shape of your eyes.