White light ensures true iris colour. Coloured bulbs can distort perception of colour - one of the most important features of an iris assessment. Iridologists need good magnification and true colour to accurately assess the eyes. Iris Light offers superb clarity and unlike higher magnification lenses, this unit allows distance between you and your client without visual distortion at the edges of the lens. It comes in a protective pouch and needs two AA batteries (Not included). These features make the Iris Light our most popular viewer. Great value for money!