Does Botox Make Eyes Noticeably Bigger?

Botox rarely makes eyes look bigger but can in rare cases. It usually just makes the wrinkles less noticeable. Botox lasts 3-4 months and cost roughly $300-350 for around the crows feet of the eyes. 

Hi Wrinkles,
Botox can be used to raise the lateral 1/3 of your eye brows resulting in your eyes appearing more "open".  Good luck and be well.
Dr. P

Botox acts by selectively weakening muscles. Since ALL muscles come in a group that lift and another group that pulls down - weakening the muscle that pulls the side of the brow down (Orbicularis Oculi) will allow the eyebrow lifting (Frontalis) muscle to elevate the side brow. Similarly with the inner brows. If we weaken the snarling muscles between the brows on the upper bridge of the nose which pull the inner brows down - this would allow the frontalis to BOTH lift and spread the inner brows - giving you a rested look.
If THIS is what you meant by "open" - then Botox is for you.
Good Luck.