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

Mumcuoglu T, Durukan HA, Erdurman C, Hurmeric V, Gundogan FC - Indian J Ophthalmol (2010 Nov-Dec)

Bottom Line: The patient was diagnosed with partial ONA.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.

View Article: PubMed Central - PubMed

Affiliation: Department of Ophthalmology, Gulhane Military Medical School, Etlik, Ankara, Turkey. tarkanmumcuoglu@yahoo.com

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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(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
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Figure 0004: (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

Mentions: Visual field test and electrophysiological tests were performed for functional evaluation. Humphrey visual field testing revealed a superior altitudinal visual field defect [Fig. 4A and 4B]. Monocular pattern visual evoked potentials (PVEP) testing to five different check sizes (2’, 1’, 30°, 15°, 7°) showed even unrecordable P100 peaks to all checks in the right eye. Transient pattern electroretinogram (PERG) testing showed reduced P50 peak amplitude in the right eye [Fig. 4C and 4D].


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

Mumcuoglu T, Durukan HA, Erdurman C, Hurmeric V, Gundogan FC - Indian J Ophthalmol (2010 Nov-Dec)

(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
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2993985&req=5

Figure 0004: (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
Mentions: Visual field test and electrophysiological tests were performed for functional evaluation. Humphrey visual field testing revealed a superior altitudinal visual field defect [Fig. 4A and 4B]. Monocular pattern visual evoked potentials (PVEP) testing to five different check sizes (2’, 1’, 30°, 15°, 7°) showed even unrecordable P100 peaks to all checks in the right eye. Transient pattern electroretinogram (PERG) testing showed reduced P50 peak amplitude in the right eye [Fig. 4C and 4D].

Bottom Line: The patient was diagnosed with partial ONA.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.

View Article: PubMed Central - PubMed

Affiliation: Department of Ophthalmology, Gulhane Military Medical School, Etlik, Ankara, Turkey. tarkanmumcuoglu@yahoo.com

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.

Show MeSH
Related in: MedlinePlus