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Cataract is our current rate of blindness eye disease, the disease has been listed as the first of three rehabilitation object. With the improvement of people's living standards, vision, improve visual quality after cataract surgery is becoming increasingly important. Postoperative corneal astigmatism become the main factors affecting postoperative visual quality. How to control and correction after cataract surgery astigmatism has become the hot issues of concern ophthalmologist. Traditional large incision extracapsular cataract extraction surgery is often caused by surgically induced corneal astigmatism, affecting Fuming effect. Phacoemulsification surgery can significantly reduce postoperative astigmatism, but need expensive equipment, universal application is difficult in poverty-stricken areas and most of the grass-roots hospitals. Sutureless small incision non-phacoemulsification surgery, simple surgical safety, cost less, in line with China's national conditions, has a promotional value. This study will have different types of incision non-phacoemulsification small incision cataract extraction and intraocular lens implantation the corneal astigmatism change for an analysis, to explore the effects of its loss of corneal endothelial cells. Objective: To study from the limbal incision at different distances and different shapes of small incision non-phacoemulsification cataract intraocular lens implantation postoperative average corneal astigmatism, astigmatism axial corneal surface regularity index and the corneal surface asymmetry index, and corneal endothelial cells changes. Limbus distance method: press incision cataract patients, 297 patients (297 eyes) were divided into three groups: group A (incision from the limbus 1.5mm), B group (incision from the corneal margin of 2.0mm), C group (incision from the limbus 2.5mm). Each group was divided into two groups: linear group (6.0mm), anti-eyebrow-shaped group (chord length 6.0mm) cut shape thus obtained six subgroups: group A1 (linear incision from the limbus 1.5mm limbus 2.0mm): 48, A2 (anti-eyebrow-shaped incision from the limbus 1.5mm): 52 person group B1 (linear incision from the limbus 2.0mm): 48 person group B2 (anti-eyebrow-shaped incision ): 45, C1 group (linear incision from the limbus 2.5mm): 54 people, C2 group (anti-eyebrow-shaped incision from the limbus 2.5mm): 50 people. Small incision cataract extraction combined with intraocular lens implantation. Corneal topography instrument TMS-4 production in Japan TOMEY models, respectively, for all patients in the preoperative and postoperative 1w, postoperative 1mo after 3mo, check average corneal astigmatism, astigmatism axial corneal surface regularity index, corneal SP-2000P Model corneal endothelial surface asymmetry index, at the same time with a Japan TOPCON company production the microscope measuring corneal endothelial cell count. Results: (1) A1, B1, C1 group average postoperative 1w corneal astigmatism differences was statistically significant (P = 0.008) after 1mo, postoperative 3mo three groups showed no significant difference (P = are 0.132,0.384). (2) A2, B2, C2 group average postoperative 1w corneal astigmatism differences were statistically significant (P lt; 0.001) after 1mo, postoperative 3mo three groups showed no significant difference (P = is 0.448,0.395). (3) B1 and B2 groups in postoperative 1w average corneal astigmatism significant difference, the difference was statistically significant (P = 0.031), postoperative 1mo, postoperative 3mo difference was not statistically significant (P values ??were 0.055,0.383). (4) C1, C2 postoperative 1w average corneal astigmatism significant difference, the difference was statistically significant (P = 0.018), postoperative 1mo, postoperative 3mo difference was not statistically significant (P values ??were 0.082 , 0.145). (5) postoperative 1w, SRI A1, B1, C1 group difference was statistically significant (P = 0.033), A2, B2, C2 group, the difference was statistically significant (P = 0.009) in B1, The B2 group difference was statistically significant (P = 0.003), C1, C2 group difference was statistically significant (P = 0.021). SAI only difference was statistically significant (P = 0.045) in C1, C2 group postoperative 1w. (6) corneal endothelial cell density and corneal endothelial cell loss rate in the preoperative and postoperative 1w postoperative 1mo postoperative 3mo, differences between groups were not statistically significant (P gt; 0.05). Conclusion: the incision farther the distance from the limbus, the smaller the early postoperative corneal astigmatism. Anti-eyebrow-shaped incision than the linear-shaped incision in the early postoperative corneal astigmatism. Corneal endothelial cell density loss rate limbal incision from the distance and notch shape correlation.
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