Hello and welcome to HCM. Thanks for your query.
As you have stated that you had brief period of loss of vision and continued to have head ache following head injury
, i would suggest you to see a doctor.
Alarming signs which you have to look for after any head injury - loss of consciousness
, loss of memory, convulsions, weakness of the body, loss of vision, bleeding from ear/nose.
To look for any internal bleeding
CT brain is recommended.
hope i have answered your query.
Wish you all the best.
DR SHEEBA STEPHEN
( Emergency consultant ).