You are basically talking about 2 things:
1. Hyperpigmentation (dark colour)
2. Scar due to an accident
Now that you are no longer wearing spectacles and have switched to contact lenses so the hyperpigmentation will not increase at least but you can apply a hydroquinone cream with a low potency steroid cream to reduce your pigmentation problem.
Scar - if at all it is a scar, it will not go by Vitamin E or any other medication. Help from a plastic surgeon needs to be taken.