Sometimes my eyes hurt. They feel strained. What could be wrong?

Too many options. This could be eyestrain or a need for eyeglasses. But we need to know your eye history., age, whether your eyes are red, light sensitive or whether the v ision has changed. If you have this persistently and it is bothersome, see your ophthalmologist to sort this out.
EYES HURT SOMETIMES. Have you have your eye sight checked lately.Do you wear glasses, do you have any other medical condition like high BP or diabetes.You definitely need to see your eye doctor to be evaluated if you need glasses a nd have a retinal exam to rule out any other serious condition.It may be nothing serious but you need to hear from an eye doctor.So go and see the eye doctor.