snowyk12 said:The bad news about that shit is the medical community knows they both are making guys go blind and it is irreversible. Ask your eye doctor about it first.
The increased risk of sudden blindness is only if you have a history of heart disease.
http://www.ncbi.nlm.nih.gov/entrez/..._uids=16424524&query_hl=4&itool=pubmed_docsum
To quote
"RESULTS: Overall, males with NAION were no more likely to report a history of Viagra or Cialis use compared to similarly aged controls (odd ratio (OR) 1.75, 95% confidence interval (CI) 0.48 to 6.30 and OR 1.82, 95% CI 0.21 to 15.39). However, for those with a history of myocardial infarction, a statistically significant association was observed (OR 10.7, 95% CI 1.3 to 95.8). A similar association was observed for those with a history of hypertension though it lacked statistical significance (OR 6.9, 95% CI 0.8 to 63.6)."