For eye ache, in general, eye exercises work well and also help you focus. It is very much like muscle ache = exercise.
Always remember to do them gently and never strain.
Use cold whatever you use, because it helps the circulation in the same way as it does when you have a cold shower.
Obviously an eye check every so often is a good idea.
But what most people will not tell you is that eyes need exercise. It makes sense that if you are always looking in the same direction and at the same short distance, your muscles will lose their tonicity.