Reliability of Corneal Dynamic Scheimpflug Analyser Measurements in Virgin and Post-PRK Eyes

被引:35
作者
Chen, Xiangjun [1 ,2 ,3 ]
Stojanovic, Aleksandar [1 ,2 ,3 ,4 ]
Hua, Yanjun [5 ,6 ,7 ]
Eidet, Jon Roger [8 ]
Hu, Di [6 ,7 ]
Wang, Jingting [6 ,7 ]
Utheim, Tor Paaske [8 ,9 ]
机构
[1] SynsLaser Kirurgi, Oslo, Norway
[2] SynsLaser Kirurgi, Tromso, Norway
[3] Univ Oslo, Oslo, Norway
[4] Univ Hosp North Norway, Eye Dept, Tromso, Norway
[5] Hubei Med Univ, Taihe Hosp, Dept Ophthalmol, Shijiazhuang, Hubei, Peoples R China
[6] Wenzhou Med Univ, Sch Ophthalmol & Optometry, Wenzhou, Zhejiang, Peoples R China
[7] Wenzhou Med Univ, Hosp Eye, Wenzhou, Zhejiang, Peoples R China
[8] Oslo Univ Hosp, Dept Med Biochem, Oslo, Norway
[9] Univ Oslo, Fac Dent, Inst Oral Biol, Oslo, Norway
关键词
IN-SITU KERATOMILEUSIS; BIOMECHANICAL PROPERTIES; INTRAOCULAR-PRESSURE; REFRACTIVE SURGERY; RISK-FACTORS; DEFORMATION; KERATOCONUS; ELASTICITY; STIFFNESS; GLAUCOMA;
D O I
10.1371/journal.pone.0109577
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
070301 [无机化学]; 070403 [天体物理学]; 070507 [自然资源与国土空间规划学]; 090105 [作物生产系统与生态工程];
摘要
Purpose: To determine the measurement reliability of CorVis ST, a dynamic Scheimpflug analyser, in virgin and postphotorefractive keratectomy (PRK) eyes and compare the results between these two groups. Methods: Forty virgin eyes and 42 post-PRK eyes underwent CorVis ST measurements performed by two technicians. Repeatability was evaluated by comparing three consecutive measurements by technician A. Reproducibility was determined by comparing the first measurement by technician A with one performed by technician B. Intraobserver and interobserver intraclass correlation coefficients (IC(s) were calculated. Univariate analysis of covariance (ANCOVA) was used to compare measured parameters between virgin and post-PRK eyes. Results: The intraocular pressure (IOP), central corneal thickness (CCT) and 1st applanation time demonstrated good intraobserver repeatability and interobserver reproducibility (ICC >= 0.90) in virgin and post-PRK eyes. The deformation amplitude showed a good or close to good repeatability and reproducibility in both groups (ICC >= 0.88). The (CT correlated positively with 1st applanation time (r 0.437 and 0.483, respectively, p<0.05) and negatively with deformation amplitude (r = -0.384 and -0.375, respectively, p<0.05) in both groups. Compared to post-PRK eyes, virgin eyes showed longer 1st applanation time (7.29 +/- 0.21 vs. 6.96 +/- 0.17 ms, p<0.05) and lower deformation amplitude (1.06 +/- 0.07 vs. 1.17 +/- 0.08 mm, p<0.05). Conclusions: CorVis ST demonstrated reliable measurements for CCT, IOP, and 1st applanation time, as well as relatively reliable measurement for deformation amplitude in both virgin and post-PRK eyes. There were differences in 1st applanation time and deformation amplitude between virgin and post-PRK eyes, which may reflect corneal biomechanical changes occurring after the surgery in the latter.
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页数:7
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