Hi, thanks for asking in Healthcare Magic.
Head ache with blurred vision
indicates increased intracranial pressure and needs to be investigated immediately. Possible causes could be serious or simple.
More serious causes that needs immediate attention are
1. Malignant hypertension
2. Subarachnoid hemorrhage
(Damage to blood vessels in brain).
3. Brain Tumors.
Less serious causes are
2. Glaucoma, iritis (inflammation of iris)
3. Referred pain of sinusitis and ear infection.
4. Pain due to muscle spasm of head and neck due to emotional tension.
Eye and ear problems will cause only unilateral (single side) headache on the affected side. But your husband has diffuse headache.
Investigations like CT scan, X-Rays, MRI, EEG (for vascular headache
) will help in diagnosis. So ifconsult your treating Doctor immediately.