I’m 35, and have developed quite bad under eye fine lines from the inner corner. You can quite literally see this muscle contracting and releasing when I look in the mirror. I am very sensitive to light and I think I have an overactive squinting problem which is causing these wrinkles. Is it safe to get half a unit or a full unit in the corner to relax that muscle? I read Botox should never be done underneath the eyes, but if it’s just a very small amount and very superficial will this be ok?