Is 600 diopters of myopia considered severe?
Jun 29, 2022
Source: Cainiu Health
Dr. Chen You
Introduction
Myopia of −6.00 diopters is generally considered moderate to severe. Myopia results from an elongation of the eyeball’s anterior-posterior axis, causing light rays focused by the eye’s refractive system to converge in front of the retina—hence the term “myopia.” Typically, myopia exceeding −6.00 diopters is classified as high myopia. Consequently, high myopia is frequently associated with fundus and retinal abnormalities, and best-corrected visual acuity may be suboptimal.
Myopia progression does not cease with age and, in severe cases, can exceed 2,000 degrees. When myopia reaches 600 degrees, it is classified as moderate myopia; however, it still significantly impacts daily life—for instance, wearing glasses may still leave traffic signals difficult to discern. The most effective treatment for myopia is surgical intervention. If a patient deems it necessary, surgery may be considered. But is 600-degree myopia considered severe?
Is 600-Degree Myopia Considered Severe?
A refractive error of −6.00 diopters (600 degrees) is generally categorized as relatively severe myopia. Myopia results from an elongation of the eyeball’s anterior-posterior axis, causing light rays focused by the eye’s optical system to converge in front of the retina rather than directly on it—hence the blurred distant vision characteristic of myopia. Typically, myopia exceeding −6.00 D is defined as high myopia. Consequently, high myopia is frequently associated with fundus abnormalities, including retinal degeneration, and best-corrected visual acuity may be suboptimal. Therefore, myopia of 600 degrees or more is indeed considered more serious. Regular comprehensive eye examinations—including cycloplegic refraction—are essential, along with fundus evaluation to assess for peripheral retinal degeneration.
Myopia of 600 degrees falls within the category of moderate-to-high myopia—crossing the threshold into high myopia—and leads to decreased distance vision and, in some cases, reduced near-vision quality. This impairs normal daily activities, work performance, and academic functioning, and increases the risk of pathological myopia-related complications—including fundus disease and other refractive system disorders. Accordingly, timely diagnostic evaluations—including cycloplegic refraction, ocular A- and B-scan ultrasonography, and optical coherence tomography (OCT) of the fundus—are recommended to screen for conditions such as keratoconus predisposition, retinal tears, and macular degeneration.
Patients should avoid prolonged near-work and undergo regular fundus examinations to closely monitor changes in vision and prevent complications such as retinal detachment. We hope this information proves helpful.
