Clinical Observation Of Corneal Astigmatism And Visual Acuity In Cataract Surgery With 2.2mm Steep Axial Clear Corneal Incision

Objective: To explore whether cataract surgery under the main incision of 2.2mm steep-axis transparent cornea can improve the corneal astigmatism that existed before cataract surgery,and provide some theoretical basis for clinicians to perform personalized cataract surgery.Methods: After screening by the inclusion and exclusion criteria,30 cases(40eyes)of age-related cataract patients undergoing phacoemulsifiaction and intraocular lens in ophthalmology in Taizhou People’s Hospital were divided into A,B two groups,patients in group A in the conventional 11 points(operation)of convenient operation for2.2 mm clear corneal incision,group B patients with preoperative IOL master measure corneal curvature maximum axial meridian is the steep shaft 2.2 mm clear corneal incision Lord.The uncorrected visual acuity,the best corrected visual acuity,the size of corneal astigmatism measured by IOL Master,the axial direction(the axial direction where the meridian of maximum corneal curvature is located)and the general clinical data of the two groups were collected before,1 week after,1 month after and 3 months after surgery.SIA was calculated and analyzed by Excel and SPSS23.0 software.Results:(1)There were no significant differences in gender,eye type,age,preoperative uncorrected visual acuity,best corrected visual acuity,corneal astigmatism and axial direction between group A and B(P>0.05).(2)Uncorrected visual acuity:Compared with preoperative,postoperative uncorrected visual acuity of group A and group B was improved,and the difference was statistically significant(P<0.05).Compared with group A,uncorrected visual acuity of group B was improved in each postoperative period,and the difference was statistically significant(P<0.05).The Uncorrected vision of the two groups was stable in 1 month after surgery.(3)Best corrected visual acuity: Compared with preoperative,the best corrected visual acuity after surgery in groups A and B improved,and the difference was statistically significant(P<0.05).Compared with group A,the best corrected visual acuity of group B improved in each time period after surgery,the difference was statistically significant(P<0.05).(4)Corneal astigmatism: Compared with the preoperative,the postoperative of group A increased,and the difference was statistically significant(P<0.05).Compared with preoperative,there was no significant change in group B 1 week after surgery,and the difference was not statistically significant(P>0.05),it decreased at 1month and 3 months after surgery,the difference was statistically significant(P<0.05);Compared with 1 week after surgery,group B decreased in 1 month and 3 months after surgery,and the difference was statistically significant(P<0.05);Compared with 1month after surgery,group B decreased at 3 months after surgery,and the difference was not statistically significant(P>0.05);Compared with group A,group B decreased in1 month and 3 months after surgery,the difference was statistically significant(P<0.05).(5)Axial corneal astigmatism: There was no significant difference in the axial ratio of corneal astigmatism between groups A and B before and after operation(P>0.05),and there was no significant difference in the axial ratio of corneal astigmatism between the two groups at each postoperative period(P>0.05).(6)SIA: As time went on,the SIA in the two groups A and B decreased,and the difference was not statistically significant(P>0.05).There was no statistically significant difference in SIA between the two groups in each postoperative period(P>0.05).Conclusion: When the preoperative corneal astigmatism of cataract patients is between(0.5-2.0)D,choosing the 2.2mm steep-axis clear main corneal incision can reduced astigmatism more effectively than the conventional 11-point,and it is the clinician’s personality the chemical implementation of cataract surgery provides a certain theoretical basis.