Changes Of Ocular Axis After Phacoemulsification Of Age-related Cataract And Analysis Of Related Factors

Objective: To observe the changes of ocular axis after phacoemulsification(PHACO)combined with intraocular lens implantation in age-related cataract.Methods: 71 cases(96 eyes)of age-related cataract were randomly selected from September 2017 to September 2018 whose ocular axial length ranged from 22 to 26 mm..All cases were performed by phacoemulsification and intraocular lens implantation.Eye axial length,visual acuity,refractive diopter and intraocular pressure(8:00 to 10:00)of these patients were observed before surgery and 1 day,7 days,1 month,3 months after surgery.SPSS20.0 was used to analize statistically.Results: After PHACO for age-related cataract,the axial length of the eye gradually shortened at 1 day,7 days,1 month and 3 months,and decreased by about 0.20 mm at 3months postoperatively.The axial length of the eye tended to be stable at 1 month postoperatively.The intraocular pressure increased on the first day after surgery and gradually decreased after surgery.The postoperative iop decreased by 1.56 mmhg at 3months after surgery compared with that before surgery,but the decrease slowed down after7 days.The difference was significant at 1 day,7 days,1 month and 3 months after surgery compared with that before surgery(p<0.01).The correlation coefficient was 0.90 and the sig was 0.037.When the confidence interval was 0.05,the correlation between the axial length and the intraocular pressure was significant.Postoperative uncorrected visual acuity was significantly improved,and there were statistically significant differences between 1 day after surgery and before surgery,7 days after surgery and 1 day after surgery,1 month after surgery and 7 days after surgery,and 3 months after surgery and 1 month after surgery(p<0.05),but the P gradually increased,indicating that the improvement of uncorrected visual acuity gradually decreased.There were statistically significant differences betweenthe patients 7 days after and 1 day after the operation of spherical equivalent(SE),1 month and 7 days after the operation,and 3 months and 1 month after the operation(p<0.01).Conclusion: 1.After PHACO,the eye axis of age-related cataract patients becomes shorter and the refractive state shifts to farsightedness.When the degree of intraocular lens is reserved preoperatively,the changes in the diopter caused by the changes in the eye axis should be taken into account to make the postoperative target diopter more accurate.2.After PHACO,the ocular axis tended to be stable 1 month after surgery.3.The changes of axial length after PHACO were correlated with the changes of intraocular pressure,and showed a positive correlation.