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Relationship between paravascular abnormalities and foveoschisis in highly myopic patients
R Kamal-Salah1, M J Morillo-Sanchez2, F Rius-Diaz3
1Department of ophthalmology, Centro de Investigaciones Médico-Sanitarias, Málaga, Spain.
Purpose:
To describe the prevalence of paravascular abnormalities in highly myopic patients and its relationship with myopic foveoschisis (MF).
Methods:
Cross-sectional study of 250 highly myopic eyes. All of the patients underwent a complete ophthalmologic examination that included optical coherence tomography .
Results:
Optical coherence tomography images showed 170 eyes (68%) with paravascular microfolds (PM), 121 eyes (48.4%) presented paravascular retinal cysts (PC), and 35 eyes (14%) with paravascular lamellar holes . All the eyes with PCs had PMs. Out of the 250 eyes, 48 (19.2%) had paravascular retinoschisis (PR). All the eyes (100%) with PR had paravascular cysts and PMs. Sixteen eyes (6.4%) had foveoschis. The spherical equivalent (P<0.00), PR (P=0.01), and the presence of tractional structures (P<0.00) were associated with increased risk for foveoschsis in the multivariate study.
Conclusions:
PMs were the lesions most often observed in the paravascular area in highly myopic eyes. MF would be a result of the action of different forces (intra- and extra-ocular forces), specially tractional structures, on precursor lesions (paravascular cyst and paravascular restinoschisis). Further studies are needed to confirm these results.
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