390 Gehmann clip-on iris for ordinary glasses

Improves depth of field vision for a clearer rearsight and foresight picture but allowing use of your own glasses for distance
The iris is sprung-mounted on its plate to allow accurate positioning of the iris for quick and perfect alignment
Iris leaves with our latest surface coating to eliminate oxidation and to preserve the matt black anti-glare finish
Clips to your glasses with a spring loaded rubber clamp
Can be easily flipped up (and stays up) for normal vision