I'm practising Japa Yoga for a while and recently I produced a little video with the OM chanting and the text of Mandukya Upanishad. While exercising for this video I wondered if it is better to do the chanting with eyes closed or opened.
What do you guys think about it? I experienced that I could have more attention to meditate on the verses of Mandukya Upanishad with eyes opened. And it seemed to me that also the sound of the mantra uttering was more sensitive with eyes opened. How do you practise japa yoga?