Achimugu G Omatiga¹, Oluwatoyin H Onakpoya², Bukunmi M Idowu¹,Christianah M Asaleye¹, Bernice O Adegbehingbe², Adeniyi S Aderibigbe¹

Departments of Radiology¹ and Ophthalmology², Obafemi Awolowo University Teaching Hospitals Complex, IleIfe, Osun State, Nigeria.

Authors’ email addresses:

-Omatiga AG: omatigagabriel@yahoo.com

-Onakpoya OH: uvtoyin2@yahoo.co.uk

-Idowu BM: ibmcontacts@gmail.com

-Asaleye CM: casaleye@yahoo.com

-Adegbehingbe BO: berniceola2003@yahoo.co.uk

-Aderibigbe AS: adeniyiribigbe@gmail.com

Abstract

Objective: This study was done to investigate the effect(s) of glaucoma on the ocular optic nerve sheath diameter and lens thickness using B-mode ultrasonography.

Materials and methods: One hundred and twenty study participants were recruited; 60 subjects with glaucoma and 60 age- and sex-matched controls without glaucoma. The optic nerve sheath diameter and lens thickness of both eyes were measured using a linear high frequency transducer with frequency of 6.5-12MHz.

Results: The mean optic nerve sheath diameter of the glaucomatous eyes (3.57 ± 0.19mm and 3.59 ± 0.33mm on the right and left, respectively) were significantly thinner than that of controls (4.23 ± 0.34 mm and 4.26 ± 0.30 mm on the right and left, respectively; p < 0.001). There is increased mean lens thickness in the glaucomatous eyes (4.15 ± 0.43mm and 4.18 ± 0.46mm on the right and left, respectively) than in the controls (4.01 ± 0.56mm and 3.99 ± 0.45mm on the right and left, respectively) with a statistically significant difference seen in the left eye (p = 0.024).

Conclusion: B-mode ultrasound is a reliable tool of assessing the nerve sheath diameter and lens thickness in glaucoma. Optic nerve sheath diameter is reduced in glaucoma

Keywords: Glaucoma, ultrasonography, optic nerve sheath diameter, lens thickness.

DOI: https://dx.doi.org/10.4314/ahs.v18i2.19

Cite as: Omatiga AG, Onakpoya OH, Idowu BM, Asaleye CM, Adegbehingbe BO, Aderibigbe AS. B-mode sonographic evaluation of optic nerve sheath diameter and lens thickness in Nigerian adults with glaucoma. Afri Health Sci. 2018;18(2): 343-351. https://dx.doi.org/10.4314/ ahs.v18i2.19

 B-mode sonographic evaluation of optic nerve sheath diameter and lens thickness in Nigerian adults with glaucoma.PDF