不同襻夹角对有效人工晶状体位置的影响研究OA

Objective To compare and analyze the effect of two kinds of haptic angle intraocular lens(IOL)implan-tation on the effective IOL position(ELP)using CASIA2.Methods A randomized double-blind prospective study was conducted,enrolling 60 patients(60 eyes)with age-related cataract admitted to the Department of Cataract,Hebei Eye Hos-pital from June 2024 to June 2025.According to the type of IOL implanted during the operation,the patients were divided in-to two groups:one group of 30 patients(30 eyes)received 0° haptic angle IOL implantation(0° haptic angle group),and the other group of 30 patients(30 eyes)received 5° haptic angle IOL implantation(5° haptic angle group).The changes in uncorrected visual acuity(UCVA),best-corrected visual acuity(BCVA),ELP,and diopter at 1 day,1 week,1 month,and 3 months after surgery were compared between the two groups of patients,and the effects of different haptic angles on IOL position were evaluated.Results The UCVA and BCVA of patients in the two groups significantly improved at all time points after operation compared with those before operation(all P<0.001).At 1 day after operation,the UCVA of patients in the 0° haptic angle group was better than that in the 5° haptic angle group(P=0.041).Compared with the mean ELP at each follow-up point,the ELP at 1 week after operation in the 0° haptic angle group was moved forward compared with that at 1 day after operation,and the ELP at 1 month and 3 months after operation was moved backward compared with that at 1 week after operation(all P<0.05).The ELP of patients in the 5° haptic angle group at 1 week,1 month,and 3 months af-ter operation was moved forward compared with that at 1 day after operation(all P<0.001).There were significant differ-ences in ELP between the two groups at 1 day,1 week,and 1 month after operation(all P<0.05).The ELP root mean square of patients in the 0° haptic angle group was lower than that in the 5° haptic angle group at 3 months after operation(P=0.013).The net displacement of ELP in the 0° haptic angle group was significantly lower than that in the 5° haptic an-gle group at 3 months after operation(P<0.001).There was a statistically significant difference in diopter at 1 week after operation compared with that at 1 day,1 month,and 3 months after operation in the 0° haptic angle group(all P<0.05),which showed hyperopia drift first and then myopia drift.There was a statistically significant difference in diopter at 1 day after operation compared with that at 1 week,1 month,and 3 months after operation in the 5° haptic angle group(all P<0.001),showing myopia drift.Spearman correlation analysis showed that there was a significant positive correlation be-tween the change in postoperative diopter and the change in ELP(rs=0.813,P<0.001).Conclusion Both0° haptic an-gle IOL and 5° haptic angle IOL can effectively improve the visual quality of patients.One month after surgery,it basically reaches a stable state in the capsular bag.The axial displacement of the 0°haptic angle IOL in the capsular bag is smaller than that of the 5°haptic angle IOL,and the refractive state of the former is more stable.There is still hyperopia drift after 5° haptic angle IOL implantation.