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Year : 2020  |  Volume : 68  |  Issue : 10  |  Page : 2264

Extensive myelinated nerve fibers in eye with colobomatous optic disk

1 Gomabai Netralaya, Neemach, Madhya Pradesh, India
2 B. W. Lions Superspeciality Eye Hospital, Bengaluru, Karnataka, India

Date of Web Publication23-Sep-2020

Correspondence Address:
Dr. C K Nagesha
B. W. Lions Superspeciality Eye Hospital, J. C. Road, Bengaluru, Karnataka
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ijo.IJO_2234_19

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How to cite this article:
Hirawat RS, Nagesha C K, Divakar MM. Extensive myelinated nerve fibers in eye with colobomatous optic disk. Indian J Ophthalmol 2020;68:2264

How to cite this URL:
Hirawat RS, Nagesha C K, Divakar MM. Extensive myelinated nerve fibers in eye with colobomatous optic disk. Indian J Ophthalmol [serial online] 2020 [cited 2021 Jan 20];68:2264. Available from: https://www.ijo.in/text.asp?2020/68/10/2264/295711

A 30-year-old female was evaluated for counting finger vision in squinting right eye. She was emmetropic and had essentially normal-looking fellow eye. Fundus showed extensive myelinated nerve fibers (MNF) involving posterior pole [Figure 1]a. Ultrasound-B scan revealed colobomatous defect involving optic nerve head [Figure 1]b.
Figure 1: Composite figure showing extensive myelinated retinal nerve fibers (a) with disk coloboma (b)

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MNF are generally isolated ocular findings except, rare coexistence of disk pit.[1],[2] Our case represents severe form with associated similar cavitatary disk anomaly. Myelination normally ceases at lamina cribrosa which prevents oligodendrocytes from migrating into retina.[3] We hypothesize that extensive myelination, in this case, could have facilitated by colobomatous optic nerve head and defective lamina cribrosa.

Declaration of patient consent

The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.

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Conflicts of interest

There are no conflicts of interest.

  References Top

Straatsma BR, Foos RY, Heckenlively JR, Taylor GN. Myelinated retinal nerve fibers. Am J Ophthalmol 1981;91:25-38.  Back to cited text no. 1
Jain DH, Natarajan KK. Rare association of optic disk pits with myelinated retinal nerves. J AAPOS 2017;21:429-30.  Back to cited text no. 2
Tarabishy AB, Alexandrou TJ, Traboulsi EI. Syndrome of myelinated retinal nerve fibers, myopia, and amblyopia: A review. Surv Ophthalmol 2007;52:588-96.  Back to cited text no. 3


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