Ask an Eye Doctor and Get an Answer ASAP
Thank you for the question.
Yes, you are right that a 50 years old injury would not have caused this bruise. However one needs to keep in mind that the tiny capillaries in the skin around the are thin and the tissue is loose connective tissue which can get bruised easily. A subtle trauma such as a bang on the forehead would also result in such a bruise. Sometimes the forehead trauma is so subtle that it may even go unnoticed.
You can apply a cold pak daily for 10 minutes. The bruise would take about 7 to 10 days to disappear. Tha skin will change color from red to purple to green before it disappears.
Hope the answer helps.