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Acquired pseudoduplication of the optic disc in pathologic myopia
Seong Joon Ahn1, Se Joon Woo, Jeong-Min Hwang
1*MD †MD, PhD Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea (all authors); and Department of Ophthalmology, Armed Forces Capital Hospital, Seongnam, Korea (SJA).
Summary
Pathologic myopia can cause acquired optic disc pseudoduplication due to scleral excavation and a penetrating ciliary artery. This finding helps differentiate true optic disc abnormalities from these rare cases.
Area of Science:
- Ophthalmology
- Medical Imaging
- Pathology
Background:
- Pathologic myopia is a leading cause of visual impairment.
- Acquired pseudoduplication of the optic disc is a rare condition.
- Understanding its mechanism is crucial for accurate diagnosis.
Observation:
- Prevalence of optic disc pseudoduplication was assessed in 128 patients with pathologic myopia.
- Enhanced depth imaging spectral-domain optical coherence tomography (EDI-SD-OCT) and angiography were utilized.
- The study investigated the scleral level and vascular supply of the pseudodisc.
Findings:
- Three patients (2.3%) with pathologic myopia exhibited optic disc pseudoduplication.
- EDI-SD-OCT revealed chorioretinal atrophy and scleral excavation.
- Angiography identified the short posterior ciliary artery as the vessel within the pseudodisc.
Implications:
- Scleral excavation in pathologic myopia can mimic optic disc pseudoduplication.
- A penetrating ciliary artery within the excavation contributes to this appearance.
- This research aids in distinguishing true optic disc anomalies from acquired pseudoduplications.
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