Meaning of Red dot on a Leitz eyepiece?

[Chris__R]

I have one which is a high eyepoint, which I believe means it's for afocal photography - is that right?

A second is on a plain-looking Leitz Wetzlar Periplan GF 10x eyepiece. What does the red dot on that mean?
I know GF is wide field.

[wporter]

High eyepoint eyepieces are generally meant for people who wear eyeglasses, so they don't bump their glasses into the eyelens of the eyepiece.

The red dot seems to indicate a Leitz eyepiece that is best for photography; perhaps this means that it is a projective eyepiece (not for afocal), but there seems to be some question as to whether these eyepieces are much different from the same undotted ones.

Any Leitz experts out there?

[apochronaut]

Red dots or lettering have been used by some companies to indicate strain free for pol applications. I'm not sure whether a convention has developed but in the case of objectives; black barrels with red lettering or a dot is pol indicative.