If a patient’s eye axis is longer than normal but he or she is not nearsighted, it is mostly due to a lower refractive power of the patient’s refractive system.
Myopia is a common ophthalmologic condition caused by parallel rays of light from the outside world that are refracted by the refractive system of the eye and converge to form a focal point that does not focus accurately on the plane of the retina, but instead focuses in front of the retina. A long eye axis is a common cause of myopia, but not all patients with a long eye axis develop myopia.
If a patient with a long eye axis also has a combined refractive system with low refractive power, it can cause the focus of light entering the eye to move backward and fall on the retina that extends backward, so the patient will not develop myopia.
It is recommended that patients with abnormal eye axes be seen promptly for evaluation of their condition and treatment as prescribed by their physician.