The Evaluation Of The Application Of Retinometer In Predicting Postoperative Visual Acurity After Cataract Surgery In Patients With Age-related Macular Degeneration

Objective:The predicted visual acuity of retinal visual acuity after cataract surgery in patients with age-related macular degeneration was compared with the best corrected visual acuity at one month after surgery,and the correlation,consistency,compliance rate,underestimation rate,overestimation rate,and consistency of the predicted value of visual acuity before and after mydriasis were analyzed.Methods:A total of 83 cataract patients with age-related macular degeneration were collected and divided into 4 groups according to the international grading standard of macular degeneration.Before the cataract surgery,performing retinmometer measurement before and after pupil dilation.Collected best-corrected visual acurity（BCVA）and predicted visual acurity（PVA）1 month after surgery.Pearson’s coefficient and Bland-Altman scatterplot were used to compare the correlation and consistency between the predicted value of preoperative and postoperative retinal visual acuity（PVA）and the best corrected visual acuity（BCVA）at 1 month after surgery among overall and groups.We also calculate the compliance rate,underestimation rate,overestimation rate,etc.In addition,the consistency of the predicted value of retinal visual acuity before and after mydriatic and the consistency of predicted value after surgery were compared by Pearson’s coefficient and Bland-Altman scatter plot.Results:（1）Association between preoperative mydriatic PVA and BCVA at 1 month postoperatively:Preoperative PVA in groups A,B,and C and overall were associated with postoperative BCVA(r _A=0.58,r _B=0.78,r _C=0.78,r_overall=0.71,P<0.05),and group D（r _D=0.41,P>0.05）has no association with postoperative BCVA.（2）Consistency between postmydriatic PVA and BCVA at 1 month postoperatively:There were no significant differences between preoperative PVA and postoperative BCVA in groups A,B and C（P>0.05）,and there were significant differences in group D and overall（P<0.05）.（3）Compliance rate:A:85%,B:63.6%,C:57.1%,D:20.0%,overall:56.6%.Basic compliance rate:A:15%,B:22.7%,C:33.3%,D:30.0%,overall:25.3%.Non-compliance rate:A:0,B:13.6%,C:9.5%,D:50.0%,overall:18.1%.Underestimation rate:A:95%,B:100%,C:95.2%,D:55.0%,overall:86.7%.Overestimated rate:A:0,B:0,C:4.8%,D:40.0%:overall:10.8%.（4）Consistency between preoperative PVA before and after mydriatic:There were no significant differences between preoperative PVA before and after mydriatic in groups A,B and C（P>0.05）,and there were significant differences in group D and overall（P<0.05）.（5）Consistency comparison of preoperative PVA with postoperative PVA:There were no significant differences between preoperative PVA and postoperative PVA（P>0.05）.Conclusion:Retinometer has good predictive reliability for postoperative visual acuity in patients with no AMD,mild AMD,and moderate AMD groups,and poor predictive reliability for patients with severe AMD.