Comparison of clinical efficacy of three surgical methods in the treatment of pterygium.

PURPOSE: To investigate and compare the efficacy of amniotic membrane transplantation, corneal limbus stem cell conjunctival transplantation and pedicle conjunctival flap transposition in the treatment of pterygium. METHODS: A total of 155 patients with pterygium were retrospectively analysed: 53 cases who received amniotic membrane transplantation, 41 who underwent corneal limbus stem cells conjunctival transplantation, and 63 patients who had pedicle conjunctival flap transposition. RESULTS: Patients in the three groups had no significant differences in terms of age, times since surgery, or extent of pterygium extension onto the cornea (F:1.194, 0.639, 0.140 respectively; all P>0.05). A total of 137 out of 155 patients (88.4%) completed 6 months of follow up. The recurrence rates of pterygium for the three surgeries (amniotic membrane transplantation, corneal limbus stem cells conjunctival transplantation and pedicle conjunctival flap transposition) were 14.6%, 13.9% and 7.7%, respectively. No significant difference was identified when comparing the recurrence rate between any two groups (X2: 0.008, 1.211 and 0.890; P: 0.593, 0.218 and 0.276). Five patients presented with postoperative complications, including 3 cases of sub-conjunctival hemorrhage, 1 case of amniotic membrane dissolution, and 1 case of conjunctival cyst, accounting for 3.64% of all participants. CONCLUSION: These three surgical methods are equally effective in preventing the recurrence of pterygium after excision.

[The clinical evaluate external route surgery of retinal detachment under surgical microscope].

PURPOSE: To evaluate the methods and the outcome of the retinal detachment surgery under surgical microscope. METHODS: Twenty-one consecutive cases of the rhegmatogenous retinal detachment were enrolled in this study. All received retinal detachment surgery under microscope. Location the retinal breaks, the drainage of subretinal fluid with diathermy acupuncture and retinal cryopexy through sclera were performed under surgical microscope. Buckling and or circling were performed in six cases. All the patients were followed up three to nine months. RESULTS: The reaction of retinal cryotherapy was seen clearly under the microscope. And the observation of cryotherapy and the location of retinal breaks were not affected by mild media opacities. No severe complication appeared. Twenty cases got complete retinal reattachment. One eye got reattachment after an additional scleral buckling. The visual acuity were improved in all cases, The visual acuity was better than 0.3 in 15 eyes (71.42%). CONCLUSIONS: It appeared to be simple, convenient, easy observable to perform retinal reattachment surgery under microscope.