Study finds, Corrrelation Between ATN Grade for Myopic Macul
A Study was conducted to assess the reliability of the atrophy-traction-neovascularization (ATN) classification in patients with pathologic myopia (PM) and its correlation with best-corrected visual acuity (BCVA).

100 highly myopic eyes with a spherical equivalent of more than 6.0 diopters or axial length of more than 26 mm and a total ATN score of more than 3 underwent a complete ophthalmological examination. 5 observers graded each eye using the ATN system. Mean A, T, and N scores were calculated and correlated with age, BCVA, and axial length.

--100 eyes from 91 patients were classified. Mean age, BCVA, and axial length values were, respectively, 65.1 ± 11.7 years, 0.63 ± 0.62, and 29.26 ± 2.7 mm.

--Mean ATN grades for each component were as follows: A = 2.51 ± 0.78, T = 0.88 ± 1.14, and N = 1.31 ± 1.40.

--Weighted interobserver agreement was 98.1%, 98.7%, and 94.6%, for A, T and N, respectively.

--In eyes with severe PM, BCVA was significantly lower and axial length was significantly longer.

Conclusively, the high interobserver reliability in this study shows that the modified ATN grading system is an accurate and dependable tool for classifying PM patients. BCVA is more compromised in eyes with severe PM, especially those classified A3 and/or T3, according to these data.