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. 2020 Sep 29:2020:6385098.
doi: 10.1155/2020/6385098. eCollection 2020.

Prevalence and Age-Related Changes of Corneal Astigmatism in Patients Undergoing Cataract Surgery in Northern China

Zhizhong Wu  1 , Caijuan Liu  1 , Zhimin Chen  1
Affiliations

Prevalence and Age-Related Changes of Corneal Astigmatism in Patients Undergoing Cataract Surgery in Northern China

Zhizhong Wu et al. J Ophthalmol. .

Abstract

Purpose: To examine the magnitude, orientation, and age-related changes of corneal astigmatism of the eyes before cataract surgery. Setting. Hebei Eye Hospital, Hebei, China.

Design: A clinical-based retrospective study.

Results: The study consisted of 5662 eyes of 5662 consecutive cataract surgery patients with a mean age of 68.26 ± 10.39 (mean ± standard deviation (SD)) years (range 40 to 97 years), and 59.86% of the patients were women. Mean corneal astigmatism was 0.98 ± 0.76 diopter (D) (range 0.00-9.61 D). Corneal astigmatism of 0.50-0.99 D was the most common range of values (30.08%), followed by 1.00-1.49 D (22.15%), ≤0.50 D (21.21%), and 1.50-1.99 D (10.28%). There was a strong U-shaped relation between corneal astigmatism and age (p for nonlinearity <.01). With the increase of age, the astigmatism axis gradually changes from with-the-rule (WTR) to against-the-rule (ATR). Moreover, in young patients with age below 65 years, WTR astigmatism was negatively correlated with age, while ATR was positively correlated with age (r = -0.11, p=.001; r = 0.10, p=.010, respectively). However, in the old patients with age above and equal to 65 years, all types of astigmatism were positively correlated with age.

Conclusion: This study may provide valuable and practical information to surgeons when selecting the appropriate surgical method and toric intraocular lens (IOLs).

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Conflict of interest statement

The authors declare that they have no conflicts of interest.

Figures

Figure 1
Figure 1
Distribution of corneal astigmatism (D).
Figure 2
Figure 2
Corneal astigmatism in different age groups. Boxes show the interquartile range. Bold lines in boxes represent the median, and the whiskers represent extreme values.
Figure 3
Figure 3
Association between corneal astigmatism and age. Corneal astigmatism is indicated by a solid line, and 95% confidence interval is indicated by the shaded area.
Figure 4
Figure 4
Relationship between corneal astigmatism axis and age. (a) Changes in corneal astigmatism axis with age. (b) Differences in the corneal astigmatism axis in age groups.
See this image and copyright information in PMC

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