High Myopia or Pathological Myopia is actually one of the leading causes of blindness and low vision in developed countries.
High Myopia is an eye disease that differs from a simple myopia (low or medium myopia), because in addition to a high refractive defect greater than -6.00 dioptres, the eye is larger than normal (elongation of the eye), and has more risk of retinal detachment, choroidal neovascularisation or haemorrhage.
It is the leading cause of membership at the ONCE association in Spain.
Risk factors include beginning at an early age and a poorer prognosis when the patient is younger; female gender, genetic factor and smoke, increase also the risk.
This condition can cause a significant loss of visual acuity, visual field affectation; glare problems with light changes adaptation, and a loss of vision in low light environments at night, with decreased contrast sensitivity.