Re: Checking Collimination of Big Eyes
Everybody has different spacing between their eyes as you know. The optics must be set for the person using the glass.
This includes collimation tecniques also.
The only way to get them as perfect as possible is to align both scopes with each other "exactly" (looking at least 1000 yards away)to begin with, then adjust the eye spacing till you have one nice round picture, then focus each eyepiece one at a time while closing the opposit eye.
With eye problems, the owner of the glasses "must" make his own adjustments till the scopes fit him exactly.
Whatever works best for him is the ideal.