Prefoveolar membrane in macular hole opercula formation

Area of Science:

• Ophthalmology
• Retinal Imaging
• Macular Diseases

Background:

• Idiopathic macular holes are a significant cause of vision loss.
• Understanding macular hole opercula formation is crucial for surgical success.
• Optical coherence tomography (OCT) and intraoperative observation offer insights into macular hole pathophysiology.

Purpose of the Study:

• To elucidate the process of macular hole opercula formation.
• To investigate the role of the posterior hyaloid and anterior wall structures.
• To correlate OCT findings with intraoperative observations in macular hole stages 1-3.

Main Methods:

• Seventy-nine eyes of 71 patients with idiopathic macular holes (stages 1-3) were studied.
• Optical coherence tomography (OCT) was used for imaging.
• Intraoperative observations during vitrectomy were performed before and after posterior hyaloid peeling in stages 1 and 2.

Main Results:

• OCT revealed steps on the anterior wall of foveal cysts in stage 1 holes, connected to the posterior hyaloid.
• Opercula were incompletely detached in stage 2 holes, adhering to the hole edge.
• Post-peeling, a semitransparent opacity (operculum) was noted on the posterior hyaloid face in operated eyes, with unchanged foveal opening size in stage 2.
• Stage 3 opercula were consistently above the posterior hyaloid plane on OCT.

Conclusions:

• The anterior wall of an evolving macular hole consists of a prefoveolar membrane and inner retinal layer.
• The prefoveolar membrane appears critical for persistent vitreofoveal adhesion.
• This membrane likely plays a significant role in the formation of macular hole opercula.