Gender-differences in age-related changes of corneal astigmatism in Korean cataract patients

AbstractThe aim of the study is to explore the distribution patterns and internal correlations of the morphological parameters of the cornea in patients with age-related cataract. The Pentacam HR was used to measure anterior corneal astigmatism (ACA), posterior corneal astigmatism (PCA), total corneal astigmatism (TCA) and keratometric corneal astigmatism (KCA). With age, the proportion of with-the-rule (WTR) ACA decreased from 65.31% to 23.63%, while the against-the-rule (ATR) ACA increased from 26.53% to 56.20%. PCA exceeded 0.50 D in 9.14% of eyes, while 76.35% of them were ATR. The magnitude of ACA was positively correlated with PCA in the whole sample, with a more significant correlation in WTR eyes (sr = 0.349, P < 0.001). The vector summation effect of PCA to ACA changed from compensation to augmentation with aging. In 57.53% of WTR eyes, KCA was overestimated by an average of 0.21 ± 0.17 D, while it was underestimated by 0.38 ± 0.27 D in 87.62% of ATR eyes. In conclusion, among age-related cataract patients, ACA and TCA gradually shifted from WTR to ATR with aging, while most PCA remained as ATR. Ignoring the age-related changes and real PCA might cause overestimation of WTR astigmatism and underestimation of ATR astigmatism.

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Age-related changes in with-the-rule and oblique corneal astigmatism

Acta Ophthalmologica ◽

10.1111/aos.13683 ◽

2018 ◽

Vol 96 (6) ◽

pp. 600-606 ◽

Cited By ~ 6

Author(s):

Kristian Naeser ◽

Giacomo Savini ◽

Jesper Flethøj Bregnhøj

Keyword(s):

Corneal Astigmatism ◽

Age Related ◽

Age Related Changes

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Power Vector Analysis of Corneal Astigmatism among Chinese over Fifty Years Old: a retrospective cross-sectional study

10.21203/rs.3.rs-17216/v1 ◽

2020 ◽

Author(s):

Yilin Pang ◽

Xiaoguang Cao ◽

Xianru Hou ◽

Li Yuan ◽

Yongzhen Bao

Keyword(s):

Axial Length ◽

Linear Trend ◽

Linear Regression Analysis ◽

Corneal Astigmatism ◽

Vector Analysis ◽

Cross Sectional ◽

Age Related ◽

Relationship Of ◽

The Relationship ◽

Cataract Patients

Abstract Background: To investigate the relationship between corneal astigmatism and age, axial length (AL) among Chinese over fifty years old. Methods: This study enrolled 1,082 right eyes of age-related cataract patients over 50 years old in the clinic of Peking University People’s Hospital, Beijing, China. Axial length, magnitude and meridian of anterior corneal astigmatism were measured by IOLMaster. Restricted cubic splines and Spearman rank correlation coefficients were used to investigate the relationship of the magnitude of cornea astigmatism to age and AL. Power vector analysis method and linear regression analysis were used to assess the relationship of the meridian of astigmatism to age and AL. Results: For this study , mean age, AL, and corneal astigmatism value were 72.45 ±9.28 years, 23.90±1.93mm, and 1.12±0.74D, respectively. The magnitude of corneal astigmatism was 0.75D or higher in 63.8% eyes. The magnitude of corneal astigmatism increased with age after 65 years old. This correlation was statistically significant when AL was between 22.00mm and 26.00mm. The vector value in J 0 was inversely correlated with age. The mean vector value change from with-the-rule (WTR) to against-the-rule (ATR) corneal astigmatism was 0.22D/10 years during 50-65 years old and 0.15D/10 years during 65-85 years old, and was 0.22D/10 years in male and 0.12D/10 years in female, respectively. Conclusions: A large proportion of elderly Chinese cataract patients over 50 years old have corneal astigmatism more than 0.75D . There was a non-linear trend from WTR astigmatism towards ATR astigmatism with age, which was more obvious in elder age and in male. When AL is between 22.00mm and 26.00mm, the magnitude of corneal astigmatism increases with age after 65 years old.

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Age-related changes and gender differences of upper body anaerobic performance in male and female sprint kayakers

Biology of Sport ◽

10.5604/20831862.901137 ◽

2009 ◽

Vol 26 (4) ◽

pp. 325-338 ◽

Cited By ~ 2

Author(s):

D Sitkowski ◽

R Grucza

Keyword(s):

Gender Differences ◽

Upper Body ◽

Anaerobic Performance ◽

Male And Female ◽

Age Related ◽

And Gender ◽

Age Related Changes

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Age-related Changes in Anterior, Posterior Corneal Astigmatism in a Korean Population

Journal of the Korean Ophthalmological Society ◽

10.3341/jkos.2017.58.8.911 ◽

2017 ◽

Vol 58 (8) ◽

pp. 911

Author(s):

Yoon Seob Sim ◽

Soon Won Yang ◽

Yu Li Park ◽

Kyung Sun Na ◽

Hyun Seung Kim

Keyword(s):

Corneal Astigmatism ◽

Korean Population ◽

Age Related ◽

Anterior Posterior ◽

Age Related Changes ◽

Posterior Corneal Astigmatism

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Morphometric Study of Gender Differences with Regard to Age-Related Changes in the C57BL/6 Mouse Kidney

Experimental Animals ◽

10.1538/expanim.55.399 ◽

2006 ◽

Vol 55 (4) ◽

pp. 399-404 ◽

Cited By ~ 17

Author(s):

Akira YABUKI ◽

Shin TANAKA ◽

Mitsuharu MATSUMOTO ◽

Shusaku SUZUKI

Keyword(s):

Gender Differences ◽

Mouse Kidney ◽

Morphometric Study ◽

Age Related ◽

Age Related Changes

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

Journal of Ophthalmology ◽

10.1155/2020/6385098 ◽

2020 ◽

Vol 2020 ◽

pp. 1-6

Author(s):

Zhizhong Wu ◽

Caijuan Liu ◽

Zhimin Chen ◽

Enrique Mencía-Gutiérrez

Keyword(s):

Cataract Surgery ◽

Young Patients ◽

Northern China ◽

Corneal Astigmatism ◽

Toric Intraocular Lens ◽

Old Patients ◽

Age Related ◽

Study Results ◽

Range Of Values ◽

Age Related Changes

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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Gender Differences in Age-Related Changes in Cardiac Autonomic Nervous Function

Journal of Aging Research ◽

10.1155/2012/679345 ◽

2012 ◽

Vol 2012 ◽

pp. 1-7 ◽

Cited By ~ 56

Author(s):

Shailaja Moodithaya ◽

Sandhya T. Avadhany

Keyword(s):

Gender Differences ◽

Nervous Activity ◽

Age Groups ◽

Low Frequency ◽

Frequency Domain Analysis ◽

Total Power ◽

Adult Age ◽

Autonomic Nervous ◽

Age Related ◽

Age Related Changes

Ageing is associated with changes in cardiac autonomic control as measured by Heart Rate Variability (HRV). Not many studies have explored the influence of gender on age-related changes in cardiac autonomic regulation. This study evaluated the gender differences in age-associated changes in cardiac autonomic nervous activity by assessing HRV using frequency domain analysis of short-term stationary R-R intervals. HRV was studied in healthy males and females ranging in age from 6 to 55 years. Total power and absolute power in High-Frequency (HF) and Low-Frequency (LF) components as well as HF in normalized unit declined significantly with ageing. The HF/LF ratio was significantly higher in the adolescent and adult females compared to male of these age groups. This study suggests that gender differences exist in age-related changes in HRV. The finding that gender differences are limited to adolescent and adult age groups may indicate a role for female sex hormones in cardiac autonomic modulation.

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