Surgical induced astigmatism correlated with corneal pachymetry and intraocular pressure: transconjunctival sutureless 23-gauge versus 20-gauge sutured vitrectomy in diabetes mellitus.

Aim: To determine the difference of surgical induced astigmatism between conventional 20-gauge sutured vitrectomy and 23-gauge transconjunctival sutureless vitrectomy, and the influence of corneal pachymetry and intraocular pressure (IOP) on surgical induced astigmatism in diabetic patients.

Methods: This retrospective, consecutive case series consisted of 40 eyes of 38 diabetic subjects who underwent either 20-gauge or 23-gauge vitrectomy. The corneal curvature and thickness were measured with Scheimpflug imaging before surgery and 1wk; 1, 3mo after surgery.

[Pathogenic mechanisms and therapeutic strategies of myopic traction maculopathy].

Myopic traction maculopathy is a group of ocular fundus diseases related to high myopia, which can severely impact on patients' visual function. It is well recognized that the abnormal of macular structure and function in the disease are resulted from various traction mechanisms, including the forces from posterior vitreous detachment, posterior vitreous cortex, and macular epiretinal membrane which acting on the inner retina, the force from posterior staphyloma which acting on the outer retina, and retinal intrinsic features such as the changes of inner limiting membrane and arterioles. The treatments are mainly based on surgery, including vitrectomy and scleral reinforcement surgery in order to relieve the retinal traction.

[Coverage on cataract surgery among adults aged 40 or above in a multiethnic rural district of high altitude area in Gongshan county, Yunnan province, China].

Objective: To estimate the prevalence of cataract and its surgical coverage rate together with the burden related to bilateral cataract-blindness, among adults aged 40 or above in Gongshan county of Yunnan province and to evaluate the current cataract status and the efficacy of local cataract prevention program.

Methods: Cluster sampling was used. The protocol consisted of personal interview, pilot study, visual acuity checking, measuring the intraocular pressure; slit lamp microscopy and the fundus of the eye examination etc.