This is a good question. Botox works by paralyzing muscles. This effect is beneficial to reduce dynamic wrinkles on the forehead, glabella (between the eyebrows) and the crow's feet areas around the eyes. When Botox is injected the balance between the facial muscles is disrupted. This is advantageous for people who need to correct brow position. By injecting Botox under the brow, the orbicularis occuli muscles around the eye are weakened and the later brow raises. When Botox is injected into the frontalis muscle above the brows, the elevator muscle of the brows are paralyzed and the brow drops. For most people, a net positive balance is reached and the eyebrow is raised to a better position. When a negative balance is reached, brow height can be manipulated by injected more Botox either above or below the brows to affect position. It is best to keep in mind that it takes Botox 3 to 7 days to start working and up to 2 weeks to see the final effect. So if you are looking for results 1 day after injections, you will not see a difference.
In your question you state that your doctor injected 1 cc and 2 cc of additional Botox. I assume that you mean 0.1 cc and 0.2 cc, since the values that you stated are way to much Botox if your injector is making minor "touchups."
I hope this is helpful.
David Shafer, MD
Shafer Plastic Surgery
New York City