J Korean Ophthalmol Soc.  2013 Jul;54(7):1144-1148. 10.3341/jkos.2013.54.7.1144.

The Optical Coherence Tomography Findings of Optic Tract Syndrome

• Kim JY
• Lee HJ
• Kwag JY
• Lee YH

• KMID: 2217431
• DOI: http://doi.org/10.3341/jkos.2013.54.7.1144

Abstract

PURPOSE
To report a case of optic tract syndrome in which optical coherence tomography (OCT) demonstrated the specific findings of the retinal nerve fiber layer (RNFL).
CASE SUMMARY
A 32-year-old male patient visited the hospital with right side visual field defect in both eyes that occurred immediately after a traffic accident 8 months prior. The visual acuity of both eyes was normal, and a relative afferent papillary defect was evident in the right eye. In addition, suspicious band atrophy of the right optic disc and thinning of the superior and inferior arcuate bundle were observed in the left eye. On visual field examination, homonymous hemianopia was present. Optic tract syndrome was suspected, although there was no abnormality of the visual tract on MRI. On fast RNFL thickness 3.4 scan, a thinning of RNFL in the nasal and temporal segments in the right eye and superior and inferior segments in the left eye were observed. Based on the findings, optic tract syndrome was diagnosed in the left eye.
CONCLUSIONS
We report specific OCT findings which can be useful when making a diagnosis of optic tract syndrome.

Keyword

Optic tract syndrome; Optical coherence tomography; Retinal nerve fiber layer

MeSH Terms

Accidents, Traffic
Atrophy
Eye
Hemianopsia
Humans
Male
Nerve Fibers
Retinaldehyde
Tomography, Optical Coherence
Visual Acuity
Visual Fields
Visual Pathways
Retinaldehyde

Figure

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  Figure 1. Fundus photographs. Photographs shows a horizontal pallor of the right optic disc (band or bowtie atrophy), with a superi-or and inferior arcuate bundle thinning in the left eye.

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  Figure 2. Visual field as determined by Humphrey automated perimetry. The visual field test demonstrates a right sided homon-ymous hemianopia.

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  Figure 3. Brain Magnetic resonance imaging (T2). Magnetic resonance imaging does not detect abnormal findings.

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  Figure 4. Retinal nerve fiber layer (RNFL) thickness profile of the Stratus OCT analysis. Fast RNFL thickness scan shows decreased RNFL thickness of the nasal and temporal quadrants in the right eye and the su-perior and inferior quadrants in the left eye.

Reference

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