Journal article

Publication year: 1998

Pages: 466-473

Journal: RöFo: Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren

Volume number: 168

Issue number: 5

ISSN: 0936-6652

DOI Link: https://doi.org/10.1055/s-2007-1015163

Publisher: Georg Thieme Verlag

Abstract: 
Purpose: To investigate the paths of the rectus extraocular muscles (EOMs)in patients with high axial myopia, using high-resolution magnetic resonance imaging (MRI). Methods: Coronal MR images (T-1 weighting) of the orbit were obtained with controlled gaze. Positions of recti EOMs were measured digitally in the middle of the orbit, using the NIH-image analysis software. Orbits of three different patient groups were analysed. Group 1 (n=14 orbits): Patients with high axial myopia and restrictive eye motility. Group 2 (n=8 orbits) subjects with high axial myopia and normal eye motility. Controls (n=11 orbits) with normal eye motility and no refractive error. Results: In comparison to the controls, patients with high axial myopia were found to have significant misplacement of the recti EOMs. Thus in group 1 (group 2 within brackets) the lateral rectus muscle (LR) was misplaced 2.9 (1.4) mm into the lower temporal quadrant p < 0.001 (p = 0.07). The course of the superior rectus muscle (SR) was shifted 1.5 (1.5) mm medially p=0.02 (p=0.03) and the path of the inferior rectus muscle (IR) 1.3 (1.3) mm medially p=0.06 (p=0.06). The medial rectus muscle (MR) showed a 1.3 (1.2) mm downward mislocation p=0.01 (p=0.07). Conclusions: In patients with high axial myopia (group 1 and group 2) misplacement of all rectus EOMs could be demonstrated by high resolution MRI with controlled gaze. All patients showed an approximately equal amount of MR, SR and IR mislocation. However, misplacement of the LR was significantly greater in patients with high myopia and restrictive eye motility (group 1) than in those without restrictive ocular motility (group 2), p=0.03. We therefore assume that LR downward mislocation is a major determinant for restrictive eye motility in high myopia.

Harvard Citation style: Schroeder, B., Krzizok, T. and Traupe, H. (1998) Magnetresonanztomographische Messungen des Verlaufs der geraden äußeren Augenmuskeln bei Normalpersonen und bei Patienten mit hochgradiger Kurzsichtigkeit, RöFo: Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren, 168(5), pp. 466-473. https://doi.org/10.1055/s-2007-1015163

APA Citation style: Schroeder, B., Krzizok, T., & Traupe, H. (1998). Magnetresonanztomographische Messungen des Verlaufs der geraden äußeren Augenmuskeln bei Normalpersonen und bei Patienten mit hochgradiger Kurzsichtigkeit. RöFo: Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren. 168(5), 466-473. https://doi.org/10.1055/s-2007-1015163