ChromoGen lenses are a series of coloured filters created to help with colour vision deficiency.  They work by changing the wavelength of each colour going into one or both eyes, which enhances colour perception and colour discrimination.  They can be worn discretely as soft contact lenses or made up as glasses.

 The ChromoGen therapy adapts one of these filters, thereby providing immediate visual comfort.  They can enhance colour perception and colour discrimination for people who are colour blind or suffer from visual stress (also known as perceptual distortion) experienced in conditions such as Irlen Syndrome, Dyslexia, Dyspraxia, ADHD and Autism, and can therefore improve reading ability. 

The most common symptoms of visual stress include words moving or sinking, shimmering or forming patterns that interfere with reading.