Although I am not a DIY kind of guy due to a lack of skill, talent and patience; I really appreciate your excellent posts on these beautiful screw drivers.
BTW, there has been some rather remarkable improvements made to people afflicted with MD of the eyes by use of a hyperbaric oxygen chamber. It is non invasive and aids that particular issue dramatically in many cases. If I was so afflicted, I would certainly explore it further. Good luck!

W. R. Eddleman