The influencing factors of surgically induced astigmatism in phacoemulsification

Yaoyao Huang; Baoqi HU; Xin Wang; Tan Long; Ting MA; Rui Wang

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The influencing factors of surgically induced astigmatism in phacoemulsification

VernacularTitle:白内障超声乳化术源性散光影响因素分析
Author: Yaoyao HUANG ^{1
,

2
,

3} ; Baoqi HU ⁴ ; Xin WANG ^{1
,

2
,

3} ; Tan LONG ^{3
,

5
,

6} ; Ting MA ^{3
,

5
,

6} ; Rui WANG ^{3
,

5
,

6}
Author Information

1. College of Life Sciences, Northwest University, Xi’an 710069
2. The First Affiliated Hospital of Northwest University, Xi’an 710002
3. Xi’an No.1 Hospital, Xi’an 710002
4. Department of Ophthalmology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, China
5. The First Affiliated Hospital of Northwest University, Xi’an 710002
6. Shaanxi Institute of Ophthalmology, Xi’an 710002
Publication Type:Journal Article
Keywords: phacoemulsification; surgically induced astigmatism; posterior surface of cornea; axial length; white-to-white
From: Journal of Xi'an Jiaotong University(Medical Sciences) 2023;44(2):263-270
CountryChina
Language:Chinese
Abstract: 【Objective】 To investigate the influencing factors of surgically induced astigmatism (SIA) in phacoemulsification. 【Methods】 Cataract phacoemulsification was performed in 69 patients with regular corneal astigmatism from December 2021 to March 2022. SIA of the anterior corneal surface, posterior corneal surface and simulated keratometry (SimK) in the diameter range of 3 mm, 5 mm and 7 mm centered at the apex of the cornea was observed. Pearson correlation analysis was used to analyze SIA with age, axial length (AL), anterior chamber depth (ACD), white-to-white (WTW), and central corneal thickness (CCT). Multiple linear regression was used to analyze the influencing factors of SIA. 【Results】 The mean age of the 69 patients was (63.25±14.74) years old, and 28 (40.58%) were male. The analysis found that the |SIA| of SimK was negatively correlated with WTW (r=-0.265, P=0.028), the |SIA| of 3 mm, 5 mm, 7 mm anterior surface was negatively correlated with WTW (r=-0.320, P=0.007; r=-0.337, P=0.005; r=-0.287, P=0.017), and the |SIA| of 3 mm, 5 mm, 7 mm posterior surface was negatively correlated with AL (r=-0.390, P=0.001; r=-0.352, P=0.003; r=-0.317, P=0.008). Multiple regression analysis showed that WTW was negatively correlated with |SIA| of SimK, 3 mm, 5 mm, 7 mm anterior surface and 3 mm posterior surface (B=-0.261, P=0.047; B=-0.387, P=0.016; B=-0.323, P=0.009; B=-0.297, P=0.041; B=-0.085, P=0.049). WTW was positively correlated with XSIA of 3 mm anterior surface, YSIA of 5 mm, and 7 mm anterior surface (B=0.347, P=0.040; B=0.318, P=0.034; B=0.403, P=0.010). AL was negatively correlated with |SIA| on the posterior surface of 3 mm and 5 mm (B=-0.023, P=0.021; B=-0.034, P=0.030). 【Conclusion】 During cataract surgery, the effect of ocular biological parameters such as axial length and corneal diameter on SIA should be considered.