**High myopia** (m. alte or m. altum) is a medical term that is used to designate a special form of myopia when the eyes are unable to focus on distant objects due to severe stretching of the eyeball. This condition requires medical attention and is usually accompanied by discomfort. Treatment for high myopia can be surgical and requires the intervention of a qualified physician. In this article we will look at what high myopia is, why it occurs, and how to treat it.
**What is the source of myopia?** Myopia is usually caused by a defect in the refractive power of the eye, in which light rays from a distant object are focused directly in front of the retina and do not reach it properly. Because of this, a person perceives distant objects as more blurry and indistinct. There are two main causes of myopia - hereditary and caused by some physical influence. Visual impairment can be passed on from generation to generation. A nearsighted mother is likely to pass the defect on to her children, and although the result may be mild, it is usually permanent. Ophthalmology recognizes a broad category of myopic conditions. * Hereditary (genetically related). This type of myopia can begin as early as adolescence and progress slowly throughout life.