Were blindness rather than ICD a side effect of Dopamine Agonists [DA] then I am pretty sure they would be withdrawn from the market.
Hey big spender:
Society frowns on those of its members who display compulsive behaviours and blames the member. Many with PD on DA have ICD but dont say.
Hey big mender
Big Pharmaceutical companies [like Oil ones] only mends the damage caused when it has to through government legislation and then only does the minimum.
The treatment is worse than the disease.