Genteal Severe Eye Gel eBay Alcon Genteal Gel Lubricant Eye Gel 10g, Beauty & Personal Care, Vision Care on Carousell Knee Gel Injections (Viscosupplementation) Cahaba Pain and Spine Care Best Lubricant Eye Gels for Dry Eyes Genteal & More A gel injection for the knee helps improve joint lubrication when natural synovial fluid becomes thinner or less effective, which often happens with arthritis., This gel acts as a cushion and Gel injections (also called viscosupplementation) are used to treat joint pain from arthritis, especially in the knee. The gel acts as a lubricant and shock absorber inside the joint, helping reduce friction,