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As per your description,his blood pressure should be monitored firstly.
If he has dizziness,headache along with such blurred vision then visit ER.
Otherwise see an Ophthalmologist for eye exam to rule out possible causes like dry eyes from work,conjunctivitis,cornea swelling.
He can apply cool compresses on eyes and try lubricating eye drops.
If he has pain,itching,severe blurred vision then visit ER.
Feel free for further queries. It's good to discuss rather than quit.
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