Comparison of the horizontal diameter to a modeled area of traction in eyes with vitreomacular traction: is the diameter close enough to the truth?

Paul, Christoph; Krug, P.; Müller, H. H.; Wachtlin, J.; Mennel, S.; Müller, S.; Schmitz-Valckenberg, S.; Bertelmann, T. und Schumann, R. G. (2018): Comparison of the horizontal diameter to a modeled area of traction in eyes with vitreomacular traction: is the diameter close enough to the truth? In: Graefes Archive for Clinical and Experimental Ophthalmology, Bd. 256, Nr. 10: S. 1817-1822

Abstract

In daily practice, vitreomacular traction (VMT) is described by the horizontal diameter of its attachment site implying a regular round shape of VMT. We investigated the deviation from this circular area of vitreous traction in patients with VMT. A retrospective analysis of optical coherence tomography (OCT) scans was performed. The area of vitreomacular attachment was determined using six radial OCT scans (A (measured)). The assumed circular area of traction was calculated based on measuring the maximal horizontal diameter for comparison (A (circular)). Thirty-seven eyes of 37 patients with pure VMT were included. Patients' mean age was 72.8 +/- 8.2 years. Mean horizontal VMT diameter was 400.8 +/- 230.5 mu m (median 361 mu m;range 44-991 mu m). While there was no difference between mean areas of traction for A (circular) and A (measured) (P = 0.93), the individual difference (|A (circular) - A (measured)|) was 0.042 (+/- 0.044) mm(2) in mean or relative 73.0% (+/- 135.8%). A difference of ae 30% of A (measured) to A (circular) was found in 16 eyes (43.2%) and ae 100% in 7 eyes (18.9%), respectively. Vitreous attachment sites possess an irregular non-circular shape in a significant number of eyes with VMT. Consequently, the area of traction appears inaccurately described by its horizontal VMT diameter alone. As the area of traction is important for therapeutic recommendation, our results emphasize the need for a more precise description of the area of traction in eyes with VMT.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Medizin
• Themengebiete: 600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin und Gesundheit
• ISSN: 0721-832X
• Sprache: Englisch