Consistency of corneal curvature and astigmatism measured by new swept-source optical coherence tomography and Scheimpflug anterior segment analyzer in patients with age-related cataract
10.3980/j.issn.1672-5123.2023.2.18
- VernacularTitle:新型SS-OCT与Scheimpflug眼前节分析仪测量年龄相关性白内障患者角膜屈光力及散光的一致性
- Author:
Hua CHAI
1
;
Ji-Qi ZHENG
1
;
Lan-Ping SU
1
Author Information
1. Cataract Rehabilitation Center, Gansu Province Rehabilitation Center Hospital, Lanzhou 730000, Gansu Province, China
- Publication Type:Journal Article
- Keywords:
cataract;
new swept-source optical coherence tomography(SS-OCT);
anterior segment analyzer;
corneal curvature;
astigmatism
- From:
International Eye Science
2023;23(2):273-277
- CountryChina
- Language:Chinese
-
Abstract:
AIM: To explore Bland-Altman analysis of corneal curvature and astigmatism measured by new swept-source optical coherence tomography(SS-OCT)and Scheimpflug anterior segment analyzer in patients with age-related cataract.METHODS: A total of 177 patients(282 eyes)with age-related cataract admitted to the hospital between January and December 2021 were enrolled. The steep-axis curvature(Ks), flat-axis curvature(Kf), mean corneal curvature(Km), corneal astigmatism and astigmatism axis of anterior corneal surface, posterior surface and the whole cornea were measured by SS-OCT and Scheimpflug anterior segment analyzer respectively. All parameters were detected by paired sample t-test, intra-group repeatability test, Pearson correlation and Bland-Altman consistency analysis.RESULTS: There was no significant difference in Ks, Kf and Km of anterior corneal surface measured by SS-OCT and Scheimpflug anterior segment analyzer(P>0.05). Ks, Kf and Km of posterior corneal surface and whole cornea measured by Scheimpflug anterior segment analyzer were all greater than those measured by SS-OCT(P<0.05). There was no significant difference in astigmatism and axial values of anterior corneal surface, posterior surface and whole cornea measured by SS-OCT and Scheimpflug anterior segment analyzer(P>0.05). The intraclass correlation coefficient(ICC)of all parameters was greater than 0.88, indicating a good intra-group repeatability. Ks, Kf, Km, astigmatism and axis of anterior corneal surface, posterior surface and whole cornea measured by SS-OCT were positively correlated with those measured by Scheimpflug anterior segment analyzer(P<0.05). Bland-Altman consistency analysis showed that Ks, Kf, Km, corneal astigmatism and axis of anterior corneal surface, posterior surface and whole cornea measured by SS-OCT were highly consistent with those measured by Scheimpflug anterior segment analyzer(P<0.05).CONCLUSION: The corneal curvature and astigmatism parameters measured by new SS-OCT are highly consistent with those measured by Scheimpflug anterior segment analyzer, which can be applied in the diagnosis of corneal curvature and astigmatism in patients with age-related cataract.
