If you purchase new glasses by 30 June 2017 you may be eligible for a FREE BlueControl upgrade* (valued at $130) on your lenses. BlueControl is a lens coating that neutralises the blue light emitted by digital screens. Over exposure to blue light can cause side effects such as eye strain, headaches, blurry vision, tired eyes and sleeplessness. BlueControl protects your eyes from blue light and provides more comfortable and relaxed vision