Normal Ocular Globe Measurements Among Adults, Using Magnetic Resonance Imaging in Zaria, Nigeria

General Ophthalmology

Authors

  • JO Aiyekomogbon Department of Radiology, College of Health Sciences, University of Abuja, Abuja, Nigeria.
  • AL Rafindadi Department of Ophthalmology, Ahmadu Bello University Teaching Hospital, Zaria, Nigeria

Abstract

Introduction: The ocular globe measurements are objectively assessed at the level of the lens (mid-globe section)[1,2]. The  perpendicular distance of the anterior and posterior margins of the globe to the interzygomatic line (IZL) on axial magnetic resonance  imaging (MRI) could accurately determine the position of the globe within the orbit[2] (Figure 1). Also, axial length (AL) of the globe is  the distance from the corneal apex to an interference peak corresponding to the retinal pigment epithelium/Bruch’s membrane[3, 4].  It is an indicator of the refractive state of the eye[5]. MRI measurement of AL is also invaluable in the early detection of intrinsic ocular  tumours and  metastasis to the globe[6]. The aim of this study was to determine the normal AL of the ocular globes with the aid of  MRI, and establish the correlation between AL, and age and sex, as well as to determine the normal position of the ocular globe among  adults.

Methods: The study was conducted over a six month period from 29th November 2011 to 28th May 2012 at Ahmadu Bello University  Teaching Hospital following authorization by the Ethical Committee of the institution. The AL of the globes, and the distance between  the anterior and posterior borders of the globe, and IZL were measured at the level of the lens for 340 normal  ocular globes of 170  patients on T1-weighted MR images.  

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Author Biography

JO Aiyekomogbon, Department of Radiology, College of Health Sciences, University of Abuja, Abuja, Nigeria.

Department of Radiology, Ahmadu Bello University Teaching Hospital, Zaria, Nigeria

 

References

Sabharwal KK, Chouhan AL, Jain S. CT evaluation of Proptosis. Indian Journal of Radiology. 2006; 16 (4): 683–688.

Munshi I. The investigation of ProptosisClinical Medicine. Ophthalmology, University of the Witwatersrand. 2000. Accessed April 15, 2011.

Jong SL, Dae WL, Sang HL, Boo SO, Hak JL, Hak JK. Normative Measurements of Korean Orbital Structures Revealed by Computerized Tomography. Acta Opthalmologica Scandinavica. 2001; 79 (2): 197 -200.

Satish KB. Brain and skull. In: CT and MRI Protocol, a Practical Approach. 2nd Edition. Peepee publishers and Distributors Ltd, Shakti Vihar, Pitam Pura Delhi, India. 2010; 159-161.

Ozgen A, Ayodingoz, U. Normative Measurements of Orbital Structures using MRI. Journal of Computed Assisted Tomography. 2000; 79(3): 493 – 496.

Ozgen A, Ariyurek M. Normative Measurements of Orbital Structures using CT. Am J Roentgenology. 1998 Apr; 170(4): 1093–1096.

Nugent RA, Belkin RI, Neigel JM, Rootman J, Robertson WD, Spinell J et al. Graves’ Orbitopathy: Correlation of CT and Clinical Findings. Radiology. 1999; 177 (3): 675 – 682.

Eberhard K, Beat H and Georg VA. Graves’ Orbitopathy: Current Imaging Procedures. Swiss MED weekly. 2009 Oct 31; 139(43- 44): 618 - 623.

Hitzenberger CK. Optical measurement of axial length by laser Doppler interferometry. Invest Ophthalmol Vis Sci. 1991; 32: 616-620

Schmid GF, Papastergiou GI, Nickla DI. Validation of laser Doppler interferometric measurement invivo of axial length and thickness of fundus layer in chicks. Curr Eye Res. 1996; 15: 691-696

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Published

2023-03-24

How to Cite

Aiyekomogbon, J., & Rafindadi, A. (2023). Normal Ocular Globe Measurements Among Adults, Using Magnetic Resonance Imaging in Zaria, Nigeria: General Ophthalmology. Transactions of the Ophthalmological Society of Nigeria, 1(1). Retrieved from https://tosn.org.ng/index.php/home/article/view/153