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Alterations of posterior precortical vitreous pockets with positional changes
Hirotaka Itakura1, Shoji Kishi
1Department of Ophthalmology, School of Medicine, Gunma University, Maebashi, Japan. itakurah@med.gunma-u.ac.jp
Retina (Philadelphia, Pa.)
|March 22, 2013
Summary
Posterior precortical vitreous pockets (PPVPs) change shape with body position. The superior pocket portion enlarged when sitting, while the anterior border moved forward when supine, as seen with spectral domain optical coherence tomography.
Area of Science:
- Ophthalmology
- Anatomy
- Medical Imaging
Background:
- Posterior precortical vitreous pockets (PPVPs) are anatomical spaces.
- Understanding their morphologic changes is crucial for ophthalmologic research.
Purpose of the Study:
- To investigate the morphologic features of posterior precortical vitreous pockets (PPVPs).
- To assess changes in PPVP morphology with positional variations (sitting to supine).
Main Methods:
- Spectral domain optical coherence tomography (SD-OCT) was utilized.
- Measurements of the distance between the fovea and anterior PPVP border were taken.
- Data from 20 individuals in sitting and supine positions were compared.
Main Results:
- PPVPs were identified in 70% of participants.
- The superior portion of the PPVP was larger than the inferior portion when sitting.
- Significant anterior displacement of the PPVP border was observed in the supine position compared to sitting.
Conclusions:
- PPVP morphology is position-dependent.
- The superior PPVP enlarges in the sitting position.
- The anterior PPVP border shifts anteriorly when supine.
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