Yoga Eye Pillow

On how exactly to put done pressure on your eyes with one of these herbier feels the pillows of eye of yoga help the intermission etc? Why is the pressure good for the redtine, etc? This already seems as a mute question, but if someone could walk me by him Id appreceate it!

I am ophtalmologue.. and I mets't believes really that these things work...

Can be the kind of an effect of placebo or of something. .!!!

If you know better allows me knowledge please...