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Case Reports
. 2010 Nov-Dec;58(6):524-6.
doi: 10.4103/0301-4738.71705.

Functional and structural analysis of partial optic nerve avulsion due to blunt trauma: case report

Tarkan Mumcuoglu  1 , Hakan A Durukan, Cuneyt Erdurman, Volkan Hurmeric, Fatih C Gundogan
Affiliations
Case Reports

Functional and structural analysis of partial optic nerve avulsion due to blunt trauma: case report

Tarkan Mumcuoglu et al. Indian J Ophthalmol. 2010 Nov-Dec.

Abstract

Partial optic nerve avulsion (ONA) secondary to finger gouging is an uncommon but devastating injury. A 21-year-old man who had an acute vision loss after accidentally getting poked by himself in his right eye when he fell down during jogging is reported. The patient was diagnosed with partial ONA. Magnetic resonance imaging revealed intact optic nerve. Optical coherence tomography (OCT) revealed deep cavity at the inferior-temporal half of the optic disc. Retinal nerve fiber layer thickness was also thin at the inferior quadrant with circumpapillary OCT scan. Visual field test and electrophysiological tests showed functional abnormality compatible with optic nerve lesion. Diagnostic tools for anatomical and functional evaluation may reveal the course of this injury.

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Figures

Figure 1
Figure 1
Fluorescein angiography showing peripapillary subretinal hemorrhages and vitreous hemorrhage at the first examination
Figure 2
Figure 2
(A) Fluorescein angiography and (B) fundus photo revealing choroidal folds and partial optic nerve avulsion on the 20th day after the trauma
Figure 3
Figure 3
Optical coherence tomography findings of the affected eye. (A) Vertical scan of the optic disc showing deep cavity at the inferiortemporal half. (B) Subsequent scan revealing physiological cupping without any cavity. Circumpapillary scans on Days 30 (C), and 75 (D) after injury
Figure 4
Figure 4
(A, B) Automated perimetry showing superior altitudinal visual field defect on the gray-scale and pattern deviation probability map. (C) Pattern visual evoked potentials testing showing even unrecordable P100 peaks. (D) Pattern electroretinogram testing showing reduced P50 peak amplitude in the right eye
See this image and copyright information in PMC

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