Multi-Vision Goggles were experimental vision devices issued to all Third Echelon Splinter Cells for the purpose of being able to operate in multiple environments when deployed on a mission. They have two or more vision modes and were a signature part of a Splinter Cell's outfit, coming in two-lensed (in shades of blue, red or green) or three-lensed (in shades of green or blue) versions. The green, three-lensed version is Sam Fisher's iconic and most well-known goggles. In addition to being used by Third Echelon and Shadownet, they were also used by various groups such as ARGUS, Echelon and UPSILON. Multi-Vision Goggles were succeeded by Ultra High-Frequency Sonar Goggles, after Fourth Echelon established, the Multi-Vision Goggles returns, known as Fourth Echelon Goggles, with Sonar capabi