Eye-Beam™ GLT Fiber Optic Connection System Glenair Eye-Beam™ GLT Fiber Optic Connection System is a graded index lens-equipped, expanded-beam optical transmission system with built into a versatile F/O terminus and is easily integrated into any connector package. It delivers outstanding performance in challenging environments and eliminates maintenance cycles. The low insertion loss Eye-Beam GLT offers comparable performance to standard butt joint termini in a package that's built to withstand rugged use and frequent mating/de-mating in field conditions. The Glenair Eye-Beam GLT contact utilizes a free-floating expanded beam lens and ultra-high precision ceramic alignment sleeves as well as custom designed nickel alloy terminus bodies to ensure perfect axial alignment and optimal optical performance and can be integrated into any connector package.