I have a lazy eye, lenses fix the alignment to an extent, but when looking sideways, the lazy eye is visible. could custom lenses fix this?

It depends on factor: How long you've had your lazy eye? How well you fuse & what is your vision? If you have any double vision, or if your lazy eye has good vision? (degree of amblyopia?)If you have good vision in both, and it only occurs when tired that's one thing.If it occurs when looking sideways, customized lenses may not work.Glasses tend to camouflage it better, but depends on what your eye doctor's recommends.