Focal vitreomacular traction: a prospective study of the evolution to macular hole: the mathematical approach

Purporse To determine the associated balance of forces of the vitreofoveal interface in focal vitreomacular traction evolving to full-thickness macular hole (FTMH) and to link/explain the observed changes in the context of mathematical and physics models. Patients and methods This is a multicenter, prospective, and observational case series conducted at the Vitreoretinal Department of three different referral centers. Fellow eyes of patients with unilateral idiopathic FTMH were included. Eighty-nine patients were included in the analysis. The fellow normal eye of the study patients was imaged with spectral-domain optical coherence tomography. The main outcome measure was the optical-coherence-tomography-defined characteristics of the vitreofoveal interface and their analysis with mathematical and physics models at the end of follow-up period. Results Of the included 89 patients (66 women and 23 men; mean age +/- SD, 68.5 years +/- 9.8), 10 (11.2%) developed FTMH at the fellow eye at the end of the follow-up period. We observed two types of vitreofoveal attachment. A V-shaped (cordlike) configuration and a U-shaped configuration. The eyes with the V-shaped attachment demonstrated initial structural changes in the outer foveal layers and the eyes with the U-shaped attachment showed inner morphological changes. Conclusion We hypothesize that the type (V- or U-shaped) of the vitreofoveal attachment may affect the type and location of the initial structural change leading to the formation of FTMH from the stage of the focal vitreomacular traction.