Antique Optometry Tools,American& DeZeno Standard Co.

I found these old Optometry tools at an estate sale in California. I was told that they belonged to a former Air Force Colonel that used to work for NASA as a Optometrist.One instrument is a Giantscope #144 P,the other devices are marked DeZeno Standard Co. and American Optical.I am not sure how to use them but they are operational.This is a great collection of vintage optical instruments.Good Luck Bidding.