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Aim: To evaluate the safety and efficacy profile of 27-gauge (27G) pars plana vitrectomy (PPV) for the treatment of various vitreoretinal diseases., Methods: The clinical outcomes of 61 eyes (58 patients) with various vitreoretinal diseases following 27G PPV were retrospectively reviewed., Results: Surgical indications included rhegmatogenous retinal detachment ( n =24), full-thickness macular hole ( n =12), diabetic retinopathy ( n =11), vitreous hemorrhage ( n =6), Eales disease ( n =4), pathological myopia-related vitreous floater ( n =2), and macular epiretinal membrane ( n =2). The mean follow-up was 166.4±61.3d (range 98-339d). The mean logMAR best-corrected visual acuity (BCVA) improved from 1.7±1.1 [0.02 decimal visual acuity (VA) equivalent] preoperatively to 1.2±1.0 (0.06 decimal VA equivalent) at the last postoperative visit ( P <0.001). The mean operative time was 49.9min. With the exception of complicated cataract in one eye, no intraoperative complications were encountered. No case required conversion to conventional 20-, 23- or 25G instrumentation in all surgical maneuvers except for silicone oil infusion, which required a 25G oil injection syringe. Postoperative complications included transient ocular hypertension, vitreous hemorrhage, persistent intraocular pressure elevation, subconjunctival oil leakage, and recurrent retinal detachment. No cases of hypotony, endophthalmitis, and sclerotomy-related tears were observed., Conclusion: The current results suggest that 27G PPV system is a safe and effective treatment for various vitreoretinal diseases. When learning to perform 27G PPV, surgeons may encounter a learning curve and should gradually expand surgical indications from easy to pathologically complicated cases.

Objective: To explore the prevalence of cataract and measure the outcomes after cataract surgery in patients aged ≥ 50 years and to evaluate the validity of Rapid Assessment of Avoidable Blindness (RAAB)., Methods: A total of 76 clusters of 50 patients aged ≥ 50 years were selected through probability proportionate to size sampling. The measurements of visual acuity (VA) were made with a tumbling-E chart and the diagnosis of the principal cause of visual impairment by an ophthalmologist., Results: A total of 3288 patients were examined with a response rate of 86.5%. There were 271 males (38.7%) and 2017 females (61.3%). Among 832 cataract patients, 175 (5.3%) had blindness due to cataract. The prevalence of cataract was 9.2%, 25.2%, 47.6%, 70.1% in 50, 60, 70, 80 years old respectively. And 109 eyes underwent cataract surgery. Among 88 pseudophakic eyes (80.7%), 59 eyes achieved excellent outcomes (VA ≥ 0.3) after surgery (54.1%)., Conclusion: The major cause of blindness in Anyue is due to cataract. Attention needs to be paid to improving outcomes after surgery. RAAB provides information about the magnitude and cause of avoidable blindness so that it may be used for planning and monitoring cataract.