Myopia is a refractive state where the light entering the eye is focused naturally before the retina. It can either be refractive which is often due to the shape of the cornea, or it can be axial which is related to the length of the eye. Most people in a retinal office have axial myopia. Their eye is longer than average. As a consequence the retina is thinner than average. This can cause a number of different issues.
In the periphery degenerative holes or thin areas in the retina (lattice degeneration) can form leading to chronic retinal detachment. In the center of the retina, the macula, degenerative changes and thinning of the retina can lead to new blood vessel formation which can cause irreversible central loss of vision.
Who is at risk?
Although there is no definitive cutoff pathological myopia is defined as a prescription of greater than minus 8D. In practice anyone with myopia and a family history of retina issues should get screened by an ophthalmologist to ensure their eye is healthy.
Henry Holt, MD
1801 N.H. Medical Park Drive
Wilmington, N.C. 28403