Purpose: To describe the stages of development and natural course of a full-thickness macular hole (FTMH) in a patient with enhanced S-cone syndrome (ESCS).
Methods: This study reported the serial ophthalmologic examinations and macular spectral-domain optical coherence tomography (SD-OCT) imaging over a period of 6 years in a 29-year-old man with ESCS confirmed by electroretinography (ERG) and NR2E3 molecular genetic analysis.
Results: At presentation, patient had night blindness and visual acuity (VA) of 20/300 in the right eye (OD) and 20/100 in the left eye (OS). Examination showed bilateral retinal midperipheral pigmentary deposits and a macular schisis in OD. Electroretinography and NR2E3 genetic analysis confirmed ESCS. A year later, a lamellar MH (LMH) appeared at the fovea in OD. SD-OCT confirmed it as inner retinal layer LMH with outer retinal preservation and displayed, on the temporal side of the LMH, prominent splitting between the inner and outer retinal layers. At 2 years, a focal defect in the ellipsoid zone appeared on SD-OCT, followed by split in the outer retinal layer creating a progressively expanding outer LMH. The latter had rolled edges which then fused with the inner LMH margins creating a single full-thickness FTMH. Over the next 4 years, enlargement of the FTMH with increased adjacent retinal splitting continued. No visible vitreous abnormalities or vitreoretinal traction forces were identified at any stage during follow-up. VA OD remained unchanged.
Conclusion: This case illustrates that the clinical evolution of FTMH in ESCS may be progressive and likely involves degeneration and intraretinal, rather than vitreoretinal, traction. This should be kept in mind when considering surgical intervention in these cases.
Keywords: Enhanced S-cone; Macular hole; Macular schisis; NR2E3.