Hello Tom, I will start doing concentration exercise. But I think I cannot use the one described in your book: I can only see with one eye. Do you know another exercise I could use?
Issa
Yes. Please see the exercise 1 here.
Another two excellent exercises that actually do not require any eyesight are: focusing on the inner sound and/or Inner Light, with your eyes closed. These exercises can lead you to The Light of your Higher Self, and out of your body.
Don't forget to alter periods of concentration with periods of meditation.
Tom