Electrodiagnostics of the tilted disc syndrome

Area of Science:

• Ophthalmology
• Neuroscience
• Visual Electrophysiology

Background:

• Tilted disc syndrome is an optic disc anomaly that can mimic other optic nerve conditions.
• Distinguishing tilted disc syndrome from chiasma syndrome is crucial for appropriate patient management.
• Visually evoked potentials (VEPs) are used to assess the integrity of the visual pathway.

Observation:

• This study examined VEPs using pattern stimulation in five patients diagnosed with tilted disc syndrome.
• The goal was to determine if VEPs could reliably differentiate tilted disc syndrome from chiasma syndrome.
• Previous research suggested that anterior visual pathway compression (chiasma syndrome) causes delayed VEPs, unlike optic defects.

Findings:

• Four out of five patients with tilted disc syndrome exhibited delayed VEP responses.
• One patient with tilted disc syndrome did not show delayed VEP responses.
• The findings suggest that delayed VEPs are common in tilted disc syndrome, complicating differential diagnosis.

Implications:

• The presence of delayed VEPs in most tilted disc syndrome patients challenges the hypothesis that this finding exclusively indicates chiasma syndrome.
• Further research is needed to refine the diagnostic utility of VEPs for differentiating optic nerve disorders.
• Clinical interpretation of VEPs must consider the possibility of delayed responses in tilted disc syndrome.