Thanks for writing your query.
It is a good sign that the vision of your mother is normal.
Swelling and pain near the eye is common after face and head injury
Swelling will decrease initially by application of ice. If the swelling persists, you can give her anti inflammatory medicines after getting her examined by your doctor. You can apply locally some antibiotic cream, on the bruises.
Swelling takes few days to subside completely.
If she complins of pain or the swelling increases or she has difficulty in vision, take her immediately to the Emergency Department.
You should also investigate for the reason of her fall.Get her investigated for following :-
1. Blood pressure
3. Blood sugar (Fasting and PP)
head and neck
I hope this is helpful to you.