Universität zu Köln

Jonas, Rahul A., Brandt, Camilla F., Zhang, Qi, Wang, Ya X. and Jonas, Jost B. (2021). Location of Parapapillary Gamma Zone and Vertical Fovea Location. The Beijing Eye Study 2011. Invest. Ophthalmol. Vis. Sci., 62 (1). ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC. ISSN 1552-5783

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Abstract

PURPOSE. To assess the spatial relationship between the locations of the parapapillary gamma zone and the fovea. METHODS. In a non-glaucomatous subgroup of the population-based Beijing Eye Study population, we measured the mean angle between the optic disc-fovea line and the horizontal (disc-fovea angle), the vertical distance of the fovea from the horizontal through the optic disc center (fovea vertical distance), and the location and width of the widest part of parapapillary gamma zone. RESULTS. The study included 203 individuals (203 eyes; mean axial length, 24.4 +/- 1.5 mm; range, 22.03-28.87 mm). The widest gamma zone part was located most often temporal horizontally (51.7%), then inferiorly (43.8%), superiorly (2.5%), and nasally (2.0%). The disc-fovea angle (mean, 7.50 degrees +/- 4.00 degrees; range, -6.30 degrees to -23.25 degrees) was significantly higher (P = 0.003; i.e., fovea located more inferiorly) in eyes with the widest gamma zone inferiorly (8.46 degrees +/- 4.37 degrees) than in eyes with the widest gamma zone temporally (6.71 degrees +/- 3.46 degrees) and in eyes with the widest gamma zone temporally, superiorly, or nasally combined (6.75 degrees +/- 3.53 degrees; P = 0.003). The fovea vertical distance (mean, 0.65 +/- 0.33 mm; range, -0.20 to 1.67 mm) was longer (P = 0.001; i.e., fovea located more inferiorly) in eyes with the widest gamma zone inferiorly (0.73 +/- 0.33 mm) than in eyes with the widest gamma zone temporally (0.58 +/- 0.30 mm) and in eyes with a temporal, superior, or nasal gamma zone combined (0.58 +/- 0.31 mm; P = 0.001). The fovea vertical distance increased (multivariate analysis) with the widest gamma zone location inferiorly (beta = 0.25; P = 0.001) and wider width of the gamma zone (beta = 0.19; P = 0.01). CONCLUSIONS. An inferior fovea location is associated with a wider inferior gamma zone and vice versa, supporting the notion of an inferior shifting of Bruch's membrane as the cause for an inferior gamma zone.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Jonas, Rahul A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Brandt, Camilla F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhang, Qi UNSPECIFIED UNSPECIFIED UNSPECIFIED Wang, Ya X. UNSPECIFIED UNSPECIFIED UNSPECIFIED Jonas, Jost B. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-584396
DOI:	10.1167/iovs.62.1.18
Journal or Publication Title:	Invest. Ophthalmol. Vis. Sci.
Volume:	62
Number:	1
Date:	2021
Publisher:	ASSOC RESEARCH VISION OPHTHALMOLOGY INC
Place of Publication:	ROCKVILLE
ISSN:	1552-5783
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language NERVE-FIBER LAYER; AXIAL LENGTH; THICKNESS; CLASSIFICATION; VARIABILITY; ASSOCIATION; PREVALENCE; GLAUCOMA; SIZE; CELL Multiple languages Ophthalmology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/58439