Mutual comparative analysis:a new topography-guided custom ablation protocol referencing subjective refraction to modify corneal topographic data  

作　　者：Kaiwei Cao Lina Liu Tao Zhang Ting Liu Ji Bai 

机构地区：[1]77120 unit of People’s Liberation Army(PLA),No.1441 FengJu Ring Road,Jinniu District,Chengdu 610081,China [2]Chongqing vision institute,No.77 Changjiang 2 Road,Yuzhong District,Chongqing 400042,China [3]Department of Ophthalmology,Daping Hospital and the Research Institute of Surgery of the Army Medical University of PLA,No.10 Changjiangzhi Road,Yuzhong District,Chongqing 400042,China

出　　处：《Eye and Vision》2020年第1期347-355,共9页眼视光学杂志（英文）

摘　　要：Background:Several planning algorithms have been developed for topography-guided custom ablation treatment(T-CAT),but each has its own deficiencies.The purpose of this study is to demonstrate the potential of a novel mutual comparative analysis(MCA)informed by manifest refraction and corneal topographic data and the patient’s subjective perception in correcting ametropia.Methods:This retrospective review included patients with significant preoperative differences in the power or axis of astigmatism according to the manifest refraction and corneal topographic data(power>0.75 D and/or axis>10°).T-CAT planning was designed using MCA.Follow-ups were conducted for at least 6 months.Results:Seventy-nine patients(121 eyes)were included.The mean preoperative deviation in the astigmatic power and axis were 0.72±0.43 D and 20.18±23.68°,respectively.The average oculus residual astigmatism(ORA)was 0.81±0.32 D(range:0.08–1.66 D).Six months postoperatively,the mean spherical equivalent refraction was 0.04±0.42 D,and the mean cylinder was−0.27±0.24 D.The mean efficacy and safety indices were 1.10 and 1.15,respectively.The uncorrected distance visual acuity in 92%of the eyes was the same or better than the corrected distance visual acuity.The angle of error was±5°in 61%of eyes and±15°in 84%of eyes.Residual astigmatism was≤0.5 D in 91%of eyes.Optical quality and photopic contrast sensitivity did not change significantly(p>0.05),and the scotopic contrast sensitivity decreased at 3,6,and 12 cpd(p<0.05).The vertical coma and horizontal coma of the anterior corneal surface significantly decreased postoperatively but increased during follow-up.Conclusions:The MCA demonstrated safety,efficacy,accuracy,predictability,and stability and can be used as a complementary and feasible method for T-CAT.

关 键 词：Mutual comparative analysis Topography-guided custom ablation treatment ASTIGMATISM Manifest refraction Topography 

分 类 号：R772.2[医药卫生—眼科]