Thank you @johnbishop for the article. I have researched eyes and medical marijuana. Mainly for my Dad as he is diabetic, blind in one eye and just had a stent put in the other to keep his pressure down. I hoped cannabis might help his glaucoma. He and I share the same corneal disease also. As far as me, I just cant put my finger on the burning. Cant find evidence that marijuana might not work for implants such as my cataract lenses or cornea implants. Perhaps allergy. Just hope there is no harm. I use Systane drops when I cant handle it.