Temporal Vascular Arcade Width and Angle in High Axial Myopia

Abstract

Axial elongation was correlated with decreasing angle kappa, caused by an elongation of the disk-foveola distance because of an enlargement of the gamma zone, whereas VDA remained constant. By contrast, horizontal length of macular Bruch membrane and vertical length of macular Bruch membrane were independent of axial elongation. Axial elongation did not lead to lengthening of Bruch membrane in the macular region in eyes without macular chorioretinal lesions.

Optic disc–fovea distance and myopia progression in school children: the Beijing Children Eye Study

“…Previous histological investigations revealed that the axial myopic elongation led to an enlargement of the eye mainly in the posterior ocular segment, starting at or behind the equator and being more pronounced the closer to the The elongation of the DFD (mean: 1.16 AE 0.34 mm) in the adolescent children of our study population was mainly due to an increase in gamma zone width (+300% or 0.29 AE 0.30 mm) as compared to an increase in macular BM length (+18% or 0.74 AE 0.21 mm). This observation was in agreement with findings obtained in adults in whom the length of macular BM was mostly independent of axial length and in whom the axial elongation-related increase in DFD was mostly due to the enlargement of parapapillary gamma zone (Jonas et al 2011a(Jonas et al , 2015a(Jonas et al , 2017a.…”

“…These findings confirmed results obtained in the previous crosssectional and population-based Beijing Eye Study, in which a longer DFD was correlated with longer axial length (Jonas et al 2011a). This observation was in agreement with findings obtained in adults in whom the length of macular BM was mostly independent of axial length and in whom the axial elongation-related increase in DFD was mostly due to the enlargement of parapapillary gamma zone (Jonas et al 2011a(Jonas et al , 2015a(Jonas et al , 2017a. Previous histological investigations revealed that the axial myopic elongation led to an enlargement of the eye mainly in the posterior ocular segment, starting at or behind the equator and being more pronounced the closer to the The elongation of the DFD (mean: 1.16 AE 0.34 mm) in the adolescent children of our study population was mainly due to an increase in gamma zone width (+300% or 0.29 AE 0.30 mm) as compared to an increase in macular BM length (+18% or 0.74 AE 0.21 mm).…”

“…The DFA was mostly independent of axial elongation in adults (Jonas et al 2011a). In a similar manner, the vertical distance between the temporal superior arterial arcade and the temporal inferior arterial arcade was neither correlated with axial length, suggesting that the macular BM in adults including highly myopic individuals was independent of axial length (Jonas et al 2017a). In contrast, the length of macular Bruch's membrane (BM) defined as the distance from the foveola to the end of BM in direction to the optic disc on the e606 disc-fovea line was mostly independent of axial length (Jonas et al 2015a).…”

“…In contrast, the length of macular Bruch's membrane (BM) defined as the distance from the foveola to the end of BM in direction to the optic disc on the disc-fovea line was mostly independent of axial length (Jonas et al 2015a). In a similar manner, the vertical distance between the temporal superior arterial arcade and the temporal inferior arterial arcade was neither correlated with axial length, suggesting that the macular BM in adults including highly myopic individuals was independent of axial length (Jonas et al 2017a). Correspondingly, the thickness of BM, in contrast to the thickness of the choroid and sclera, at the posterior pole was not related to axial length (Vurgese et al 2012;Jonas et al 2014a).…”

Advances in myopia research anatomical findings in highly myopic eyes

“…It may be due to a parapapillary gamma zone-associated lengthening of the retinal nerve fibers, since gamma zone increases the disc-fovea distance [ 43 , 45 , 46 ]. Since the distance between the temporal superior arterial arcade and the temporal inferior arterial arcade is not affected by axial elongation in eyes without macular BM defects, the angle between the temporal arterial arcades decreases with longer axial length [ 100 ].…”