Please visit the following sites which give useful information about eye-care
The Night Vision Store for Homeland Security and Sport Gen 1 to 4 Night Vision Binoculars, Goggles, Rifle Scopes and Thermal Imaging for Homeland Security by ITT, ATN, Yukon, FLIR, L3, GCSI, Northrop Grumman, and Rigel. http://www.nightvisionstore.com
