I don't have experience with the vision therapies but:

PCS can cause a delayed fatigue problem with nerve controlled systems. A normal neuro/reflex test will not pick this up. It takes more continuous use of those motor nerve pathways before the weakness shows up.

This means one needs to be aware of these fatigue issues and reduce the workload before the fatigue level is reached.

An example of this is trying to do find manipulative work. If you find that your hands/fingers start to get shaky, this is likely due to reaching this fatigue level. This is a nerve function issue. It can be magnified by other stress factors like time limits or other performance stressors.

I used to have very steady hands. Now, any stressors limit my ability to maintain smooth hand movement.

It will help to consider your work environment. Are there stress factors that can be reduced? Do you work with a computer screen that has a refresh rate that is fatiguing? Anything you can do to reduce the stress substances that flow throughout the body should be helpful.

A key issues to be considered by anybody who is roller coastering through good and bad times is finding and reducing stressors. Depression is caused by these stressors. Any short term recovery from depression or anxiety will likely not last if these stressors are not reduced.