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Case of unilateral peripheral cone dysfunction.

Yujin Mochizuki¹, Kei Shinoda, Celso Soiti Matsumoto

¹Department of Ophthalmology, Juntendo University Urayasu Hospital, Chiba, Tokyo, Japan.

Case Reports in Ophthalmology

|June 9, 2012

Summary

This summary is machine-generated.

This study reports a rare case of unilateral peripheral cone dysfunction, diagnosed using electrophysiology and SD-OCT. Findings highlight the potential for asymmetric visual impairment and the utility of objective testing in diagnosing rare ocular conditions.

Keywords:

Electroretinogram Multifocal ERG Optical coherence tomography Pattern visual evoked potentials Tunnel vision

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Area of Science:

Ophthalmology
Neuroscience
Toxicology

Background:

Peripheral cone dystrophy is a rare subgroup of cone dystrophy with limited reported cases.
Understanding its presentation and pathophysiology is crucial for accurate diagnosis and management.

Observation:

A 34-year-old woman presented with blurred vision, exhibiting unilateral peripheral cone dysfunction.
Spectral domain optical coherence tomography (SD-OCT) revealed retinal thinning, and electrophysiological tests showed reduced photopic and multifocal electroretinograms (ERGs) predominantly in the right eye.
A history of paint thinner sniffing was noted, though its direct link to the dysfunction was undetermined.

Findings:

Objective tests confirmed unilateral peripheral cone dysfunction, contradicting initial psychological assessments.
Electrophysiology and SD-OCT provided valuable objective data for diagnosing the condition.
The case demonstrates that peripheral cone dysfunction can manifest unilaterally.

Implications:

This case expands the understanding of peripheral cone dystrophy presentation, emphasizing its potential for unilateral occurrence.
Electrophysiological tests and SD-OCT are essential tools for objectively evaluating and diagnosing atypical ocular conditions.
Further research is needed to elucidate the pathophysiological mechanisms and potential toxicological links, such as solvent exposure, in cone dystrophies.