Visual changes always warrant medical attention.
These symptoms of eye pain or burning eyes, with visual changes like blurred vision, could be symptoms of eyes fatigue due to prolonged reading or using the computer.
Glasses can help with this problem.
Eye changes due to diabetes, inflammation of eye nerve (optic neuritis), lack of vit. A and zinc in diet, or even more serious eye conditions like glucoma, can lead to night vision problems.

You must visit an ophthalmologist!