Although Air Optix plus HydraGlyde and Air Optix Aqua are the same lenses, the main difference is the technology they use. Air Optix HydraGlyde uses HydraGlyde Moisture Matrix technology, while Air Optix Aqua uses an Aqua Moisture System. HydraGlyde lens caters to a broader power range and has more advanced technologies such as SmartShield.