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Updated: Mar 16, 2026
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OCT in a Myelinated Retinal Nerve Fiber Syndrome with Reduced Vision
Sherry J Bass1, Jacqueline Westcott, Jerome Sherman
1*OD, FAAO †OD SUNY State College of Optometry, New York, New York (all authors).
Summary
Vision therapy for amblyopia with myelinated nerve fibers (MRNF) and optic nerve hypoplasia has a poorer prognosis. Spectral domain OCT revealed absent or attenuated photoreceptor integrity lines (PIL) in these patients, explaining the poor outcomes.
Area of Science:
- Ophthalmology
- Neuro-ophthalmology
- Medical imaging
Background:
- Refractive amblyopia associated with myelinated nerve fibers (MRNF), optic disc hypoplasia, and myopia often has a poorer prognosis with vision therapy.
- The underlying structural causes for this guarded prognosis have remained unclear.
Observation:
- This study utilized spectral domain (SD) ocular coherence tomography (OCT) to investigate three patients with MRNF, optic nerve hypoplasia, and anisomyopia.
- All patients presented with reduced vision in one eye and demonstrated either an absent or attenuated photoreceptor integrity line (PIL) in the macula via SD-OCT.
Findings:
- The presence of an absent or attenuated PIL in the macula was consistently observed in patients with the syndrome of MRNF, optic nerve hypoplasia, and anisomyopia.
- This finding suggests a potential structural etiology for the reduced visual acuity and poor response to vision therapy in this patient cohort.
Implications:
- The study identifies a novel association between the syndrome of MRNF, optic nerve hypoplasia, and anisomyopia with macular PIL abnormalities.
- These OCT findings may help explain the guarded prognosis for vision therapy in affected individuals and guide future diagnostic and therapeutic strategies.
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