Myopia is an eye disorder that causes objects at a long distance to be perceived as blurred. It is generally due to an increase in the axial length of the eye (large eyes).
When myopia exceeds 5 dioptres, we speak of high myopia, pathological myopia or myopia magna. High myopia affects approximately 2% of the population and increases the predisposition to suffer from certain eye diseases that affect vision such as retinal detachment, atrophy of the central portion of the retina, growth of blood vessels under the central area of the retina (macula), macular hole or separation of the layers of the retina (schisis).