Expanded Spectrum of Ectopic Inner Foveal Layer in Stage 3 Epiretinal Membrane

Area of Science:

• Ophthalmology
• Retinal Imaging
• Optical Coherence Tomography (OCT)

Background:

• Epiretinal membrane (ERM) is a common condition affecting the macula.
• Ectopic Inner Foveal Layer (EIFL) is a key OCT finding in Stage 3 ERM.
• Understanding the spectrum of EIFL is crucial for predicting visual outcomes.

Purpose of the Study:

• To classify the spectrum of Ectopic Inner Foveal Layer (EIFL) in Stage 3 epiretinal membrane (ERM).
• To compare demographic, anatomical, and functional characteristics across different EIFL subtypes.
• To identify predictors of EIFL subtype classification.

Main Methods:

• EIFL was classified into three subtypes (nascent, immature, mature) based on OCT features.
• Data collected included patient demographics, best-corrected visual acuity (BCVA), and OCT parameters.
• Statistical analyses included cross-sectional comparisons, correlation analyses, and multinomial logistic regression.

Main Results:

• Three distinct EIFL patterns (nascent, immature, mature) were identified in 114 eyes.
• Nascent EIFL was associated with better BCVA, while mature EIFL showed the poorest BCVA.
• Older age and greater EIFL thickness were significant predictors of more extensive EIFL subtypes.

Conclusions:

• The proposed EIFL subtypes demonstrate distinct morphological and functional profiles in Stage 3 ERM.
• Less EIFL involvement correlates with better BCVA, while increased thickness and age are linked to more severe subtypes.
• Further longitudinal studies are needed to confirm prognostic value and temporal progression.