Table 2.
META-PM Classification and an Impact on Vision
| META-PM Classification* | Visual Impairment | Pathologic Myopia |
|---|---|---|
| Category | ||
| Tessellated fundus (category 1) | None | – |
| Diffuse chorioretinal atrophy (category 2) | Mild | + |
| Patchy chorioretinal atrophy (category 3) | Parafoveal scotoma | + |
| Macular atrophy (category 4) | Central scotoma | + |
| Plus lesions | ||
| Myopic MNV (including Fuchs' spots) | Central scotoma, distorted vision | + |
| Lacquer cracks | Temporal scotoma owing to simple hemorrhage, distorted vision (in some cases) | + |
*
Modified from Ohno-Matsui K, Kawasaki R, Jonas JB, et al. International photographic classification and grading system for myopic maculopathy. Am J Ophthalmol. 2015;159:877e883.
Pathologic myopia is defined as equal or greater than myopic maculopathy category 2, or presence of “plus lesion,” or the presence of posterior staphyloma.