Influence of pars plana vitrectomy on the length of lens zonules and anterior chamber depth
Journal Title: Guoji Yanke Zazhi - Year 2018, Vol 18, Issue 7
Abstract
AIM: To quantitatively assess the influence of pars plana vitrectomy(PPV)on the length of lens zonules and anterior chamber depth(ACD).<p>METHODS: The medical records of 87 cataract patients(88 eyes)were retrospectively reviewed. Forty-three patients(44 eyes)with previous PPV were included in the study group, and 44 patients(44 eyes)without a history of PPV were served as control group. Length of zonules and anterior chamber depth(ACD)were quantitative analyzed based on the data from ultrasonic biomicroscopy(UBM)and IOL Master examinations respectively. <p>RESULTS: The average length of zonules in study and control group were 1.09±0.24mm and 0.78±0.22mm, respectively, and the difference was statistically significant(<i>P</i><0.05). The ACD of the two groups were 3.25±0.39mm and 3.44±0.48mm, respectively, and a statistical difference was observed(<i>P</i><0.05). The length of zonules in the control group was positively correlated with the ACD(<i>r</i>=0.468, <i>P</i>=0.001), however, this was not the case in the study group(<i>r</i>=0.173, <i>P</i>=0.263). <p>CONCLUSION: Previous vitrectomy may cause changes in zonular length, which may imply a possibly weakened zonules, especially for patients with the axial length less than 29mm. The change in anterior chamber depth in patients with previous PPV may not be correspondent to that in the length of zonules. The findings of our study suggest that preoperative conditions of zonules and anterior chamber should be fully understood to reduce the related complications and to improve the safety and efficiency of cataract surgery after pars plana vitrectomy.
Authors and Affiliations
Wei Fan
Surgical efficacy after two different surgical methods on visual field and RNFL thickness in patients with glaucoma
AIM:To compare the effects after two different surgical methods on visual field and retinal nerve fiber layer(RNFL)thickness in patients with glaucoma. <p>METHODS: Clinical data of 69 cases patients(82 eyes )with glaucom...
Progress on the treatment of amblyopia
Amblyopia is a common disease in the process of childhood development. Early detection, early treatment and rational application of treatment are the keys to amblyopia treatment. At present, the main treatment methods us...
Mechanism of TUDCA for retinitis pigmentosa
Tauroursodeoxycholic acid(TUDCA)is formed by taurine conjugated of ursodeoxycholic acid(UDCA). It has the role of neurotrophic factor in anti-inflammatory, anti-apoptosis and reducing the activation of microglial cells....
A review of behavioral visual acuity tests for rodents
Rodents have been used widely in the research of eye diseases to study visual function in animal models. Two methods of visual acuity testing in animals have been internationally recognized: the electrophysiological visu...
Expression of protease-activated receptor 2 in uveal melanoma and its effect on cell proliferation and invasion
AIM: To investigate the expression of protease-activated receptor 2(PAR2)in uveal melanoma(UM), and the effects of silencing the expression of PAR2 gene on proliferation and invasion of human UM cell line M23. <p>METHODS...