Case Crossover Study of PDE5 Inhibitor Exposure as a Potential "Trigger Factor" for Acute NAION
Case Crossover Study of PDE5 Inhibitor Exposure as a Potential "Trigger Factor" for Acute NAION
The objective of this non-interventional study is to examine whether use of Phosphodiesterase Inhibitors (PDE5s), including use of sildenafil, vardenafil, or tadalafil, triggers the onset of acute NAION.
Sites will identify patients who meet the entry criteria during the conduct of their normal practice. Patients meeting these criteria will be offered participation in the study after reading and completing an informed consent document.
Inclusion Criteria:
Exclusion Criteria:
Cosalada, 28822, Spain