It's been a month or two, my husband is suffering from daily headaches. His head feels heavy all day long even after proper 8-9 hours sleep. He works on the system for approximately 9 hours on weekdays and he wears anti-glare glasses. But still, he suffers from same headache on weekends too. Even after taking a medicine for the headache, it doesn't cure and it continues. Could it be because of an eyesight problem or there is some other underlying issue that needs to be diagnosed? Kindly provide your valuable assistance on this. Thank you.