Eye Contacts Depot

I am 20 years old and have had high myopia and astigmatism my entire life. Recently I have started to use marijuana recreationally but it seems to better my vision at distances and I heard it can relieve pressures of the eye, which I happen to have a ridiculous amount of pressure in my eye with extensive stress on my retna. I would like to know if Medical Marijuana would be a legitimate way for me to go about treating my vision problems.

I have to wear glasses. However, I want to change my boring brown eyes to green. Are there colored contacts that change your color and are also worn for medical purposes?