Using swept-source optical coherence tomography to analysis the morphological characteristics of posterior precortical vitreous pocket

Abstract:

AIM: To observe the morphological characteristics of posterior precortical vitreous pocket(PPVP)using swept-source optical coherence tomography(SS-OCT).

METHODS:Prospective study. One hundred and thirty-eight eyes of 91 cases with PPVP observed by SS-OCT in Henan Eye Hospital from March 2019 to June 2019 were included in the study. The average width and height size of PPVP was compared among subjects with different genders, age and equivalent spherical.

RESULTS: In 138 eyes, 112 eyes(81.2%)were ship shaped, 19 eyes(13.8%)were oval, and 7 eyes(5.1%)were hook shaped. Ninety-nine eyes(71.7%)had PPVP which connected with Martegiani area. The average width of PPVP was 6248.82±1117.87μm, and the average height of PPVP was 562.12±476.94μm. There was no difference in the width and height of PPVP between different genders(P>0.05), and the PPVP' width was positively correlated with age(r=0.32, P<0.01). The PPVP' height in low myopia group were lower than that in non-myopia and moderate myopia group eyes(P=0.01, 0.03).

CONCLUSION: PPVP is a boat-shaped fluid cavity in front of the macula, which communicates with the Cloquet canal. Its width is related to the age. The existence of PPVP may play a role in the development of PVD and its progress.

Key words:swept-source optical coherence tomography; posterior precortical vitreous pocket; posterior vitreous detachment; myopia