Can switching to hard lens help with dry eyes?

No: You should focus on treating the dry eye. There are many options. Discuss this with an ophthalmologist.

Dry Eye: It usually is not a good idea to self diagnosis. If you have dry eyes then that should be treated either with tears or punctual plugs or what your eye dr feels is best. He can measure the amount of dryness and treat accordingly. Contacts hard or soft are not really the problem and hard contacts can produce other issues.