Extract

The primary objective of this study is to determine whether the use of PDE5 inhibitors (vardenafil, sildenafil, or tadalafil) increases the risk for the development of NAION.

Inclusion criteria

• Anterior Ischemic Optic Neuropathy

Country

• Australia
• Canada
• Germany
• Italy
• Mexico
• United States

Links

• ictrp
• nct