Can smoking weed be good or bad for eye diseases such as diabetic retinopathy and retinal vein occlusion?

No: National advisory eye council reports no evidence for using marijuana for these conditions.

Weed lessens eye pre: Weed decreases eye pressure and therefore alleviates glucoma. This is one about the one and only practical benefit from weed.

No: Weed is good to decrease eye pressure and not precisly for diabetic retinopathy, unless there is increase in eye pressure as a result of diabetes. Ifyou are diabetic you have got to always always check your eye pressure. ... Diabetic eye damage from increased eye pressure, can cause serious blindness...

More downside...: More downside than upside such as lung disease. No evidence that marijuana helps either of those, and any smoking is bad for diseases that involve blood flow. Weed lowers eye pressure in glaucoma, but not for enough time to be effective. Other treatments work better.

No Smoking: Smoking anything will expose you to combustion products including carbon monoxide which reduce delivery of oxygen to the eye. For this reason, i would advise against it. Even if you live in colorado or washington! don't smoke, period.