Suddenly on road giddiness & eye pain.

Good morning, i am male 37 year old , weight 86, height 5"11 , for the past 4 years I have been using a BP tablet , present my bp tablet is metasartan CH 50 mg , due to headache and family issues anxiety and depression from last 6-7 years ( on and off) not continusly using neuro medicine , From last 1 year , when I am traveling on a bike or any other transport suddenly suffering from eyes problem ( some kind of pain in my eyes) headache , unable to stand , giddiness , I am facing this problem I used a vertigo tablet and exercise but no use I am using neuro medicine also for anxiety and depression But i am unable to control my problem 1)Is it an eye and brain coordination problem? 2) blood circulation issue in brain Please explain the problem ??