Generally defined as a refractive error of diopters or an axial length of ≥26.5is greater than or equal to 26.5
While often confused with "high myopia," pathologic myopia is distinct because it involves specific degenerative lesions rather than just a high refractive error. Pathologic Myopia
Pathologic myopia (PM), also known as degenerative myopia, is a severe form of nearsightedness characterized by excessive elongation of the eyeball (axial length) that leads to structural changes in the posterior segment of the eye . Unlike standard myopia, which can typically be corrected with lenses, pathologic myopia involves progressive and irreversible damage to the retina, choroid, and sclera, making it a leading cause of blindness worldwide, particularly in East Asian countries. Definition and Key Characteristics Generally defined as a refractive error of diopters