S711 wrote: ↑Fri Aug 16, 2019 2:29 pm
Hi Nonie!
In my mind I thought that the fingers were meant to very very VERY gently pull the skin (pulling appears like a strong move,, to create a small strecth perhaps is a better description). This to create resistance and make the under eye lid work "more". Opening the mouth creates this "resistance" Sorry, I am Italian, I can't explain it better
Thank you for coming back to answer.
When I do that exercise, I do not pull at all. I simply hold the skin firmly in place and I do feel a sufficient resistance when I close my eyes. When you close your eyes, the lower lid muscle contracts in a diagonally upward direction toward the inner corner of the eye where the muscle is anchored. It is this movement that works against the resistant of the gentle hold. You do not need to pull down or out at all. The image below shows you how contraction of the orbicularis muscle pulls everything toward the muscle's anchor point at inner corner of the eye (3).

Source:
https://tinyurl.com/yxlf8w94
You can see from the pull notated as (1), that Tom's recommended finger placements--and as you mentioned, there are more than one but all in the general area from where the muscle pulls during contraction--provide resistance exactly where it is needed. So the exercise does not need any modification, in my humble opinion.
I can tell you from experience that pulling under the eyes and then working your eyes against that resistance is not a good thing to do. I used to do a program that encouraged pulling down on that delicate skin around the eye. I found the exercise scary the first time I saw it and was afraid to do it. Scary because in15 years of doing another program, I had never seen anything so aggressive. I only went ahead and did it after being ill-advised that it was safe and essential if one was to have beautiful eyes like the author of the program did. The result of following that advice was my eyes went from never having sag or lines in 35+ years of living, to
developing under eye lines when not smiling and bulges when smiling in a very short time (probably from loss of elasticity due to that unnecessary stretch). I changed to another program that has a finger placement like Tom's for this exercise with no pulling, and in time, my eyes improved. So my belief is your finger placement with no pull is the only resistance you need for that exercise.
S711 wrote: ↑Fri Aug 16, 2019 2:29 pm thought that opening the mouth could be a possible variation of the exercise, like there are variations for the placing of the fingers like Tom explains in some post (somewhere in the forum) linking back to the video in Spanish.
I do not think opening the mouth would help this exercise's target area at all. The muscles involved in opening your mouth are far below the eye muscles. To be specific, the muscle that opens your mouth is the lateral pterygoid shown here:

Source:
https://web.duke.edu/anatomy/Lab25/Lab25.html
S711 wrote: ↑Fri Aug 16, 2019 2:29 pmI have dark circles and because I am missing nothing, I also have sunken eyes and a visible vein connecting the end of the dark (sunken) circle to the outer corner of the eyebrow.
A bit is genetics and my skin is very thin and clear. I hope that I can improve it a little bit with lots of patience.
I do believe face exercises can help by thickening the skin so that blood vessels do not show through (which is usually one reason people have dark circles) and also the thickening helps reduce the sunken look. One time when someone asked about tear troughs in another forum, I found some before and after images to show evidence that natural methods can fix the problem:
http://www.essentialdayspa.com/forum/vi ... ?tid=49226
And here are some discussions in this forum on that topic:
viewtopic.php?f=5&t=170&p=429
viewtopic.php?f=5&t=118&p=227