Myopia, or nearsightedness, is a refractive vision disorder that causes blurred sight at a distance. It occurs when the length of the eye (known as axial length) is too great; myopia progresses as axial length increases with age. The devices such as eyeglasses, contact lenses, Ortho-K lenses, among others which are used to slow down the progression of myopia are termed as myopia treatment devices.