The light rays focus behind the retina in the hyperopic eye (the eye bulb is shorter than it should be and/or the refractive power of cornea-lens is inadequate). In the young the lens is very flexible and can balance completely or in part the refractive error and carry images onto the retina. In some patients this unconscious accomodating effort can cause visual tiredness, headache, lacrimation, ocular redness. In very high hyperopia, vision can be blurred because of the insufficiency of the mechanical balance Lens flexibility reduces with age, becoming insufficient to balance the refractive error. Hyperopic patients often present worsening of vision after 40 years of age.