Exercises for Presbyopia

My son is in his forties and is wearing glasses for the first time. He is doing exercises to increase his ability to focus clearly. I don't see how these exercises can help since the lens has become more rigid. But I don't know for sure. Is it possible to reverse presbyopia in this manner?

[Ray T Oyakawa, MD]

Yes, it can slow the progression of presbyopia.  This is my opinion.

Dr. O.

[Ray T Oyakawa, MD]

Yes, it can slow the progression of presbyopia.  This is my opinion.

Dr. O.

[allmymarbles]

Can the same exercises help correct minor, but annoying, crossed eyes?

[Ray T Oyakawa, MD]

Yes, depends on the type.  It definitely can help convergence insufficiency.

Dr. O.

[allmymarbles]

One eye crosses inward and upward. I don't know what type that is. Would it work for that condition? I really appreciate your advice. This is an extremely helpful forum.