Analysis of corneal astigmatism in cataract surgery candidates at a teaching hospital in Shanghai, China

Guan, Zhong; Yuan, Fei; Yuan, Yuanzhi; Niu, Weidong

doi:10.1016/j.jcrs.2012.07.025

Cited by 52 publications

(86 citation statements)

References 16 publications

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“…1 In a previous study, 2 44% to 54% of patients with cataract had corneal astigmatism higher than 1.0 diopter (D) based on the type of keratometer. Several other studies [3][4][5] reported similar results. Corneal astigmatism can be corrected during cataract surgery using various methods, including implantation of a toric IOL.…”

supporting

confidence: 71%

Comparison of corneal astigmatism measurements of 2 optical biometer models for toric intraocular lens selection

Srivannaboon

Chirapapaisan

Chonpimai

et al. 2015

Journal of Cataract and Refractive Surgery

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supporting

confidence: 71%

Comparison of corneal astigmatism measurements of 2 optical biometer models for toric intraocular lens selection

Srivannaboon

Chirapapaisan

Chonpimai

et al. 2015

Journal of Cataract and Refractive Surgery

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“…The reasons for this were the changes in the eyelid along with aging and also the pressures of these changes on the cornea leading to astigmatic changes on the cornea [17]. Guan et al [6] investigated 827 Chinese patients, and less than 1 D astigmatism was found in 54.5% of patients and against-the-rule increased and linear regression with age. Chen et al [8], and Khan and Muhtaseb [9] were found similar result.…”

Section: Discussionmentioning

confidence: 99%

Prevalence of corneal astigmatism and axial length in cataract surgery candidates in Turkey

Çevik¹,

Çevik²,

Duman³

2016

Eur Res J

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Objectives. To analyze the corneal astigmatism and axial length values in cataract surgery candidates. Methods. The files of patients who undergone cataract surgery between November 2012 and November 2013 were retrospectively selected and reviewed. The preoperative corneal keratometry measurements in the flat and steep axis and the axial lengths of the patients were recorded. Results. The study comprised of 449 eyes of 449 patients with a mean age of 68.6±9.8 (range; 40-90) years. The mean axial length value was 23.1±1.0 mm; mean corneal astigmatism was 1.00±0.70 D. The corneal astigmatism was 1.00 D or less in 315 eyes (70.1%); between 1.00 and 2.00 D in 99 eyes (22%); and 2.00 D or more in 35 eyes (8%). With-the-rule astigmatism was present in 51% of the patients, against-the-rule astigmatism was present in 32% of the patients, and oblique astigmatism was present in 17% of the patients. We observed an increase in against-the-rule astigmatism (p=0.032) and oblique astigmatism with age (p=0.040). Conclusions. The current study is the most populous study in this field of research ever carried out in our country. The mean axial length in our study in comparison to Chinese and German populations was found to be shorter.

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“…To achieve best postoperative visual outcomes, spherical and astigmatic components of refractive error should be corrected during cataract surgery. 1 The prevalence of corneal astigmatism has been widely reported in several parts of the world.…”

Section: Introductionmentioning

confidence: 99%

Relationship between age, corneal astigmatism, and ocular dimensions with reference to astigmatism in eyes undergoing routine cataract surgery

Wakefield

Annoh

Nanavaty

2016

Eye

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Purpose To assess the relationship between age, corneal astigmatism, and ocular dimensions with reference to astigmatism correction during cataract surgery. Methods In this cross-sectional study of right eyes of 2247 consecutive patients attending cataract surgery preassessment, data on patient demographics, axial length (AL), anterior chamber depth (ACD), and keratometric astigmatism were collected. Astigmatism was further analyzed as against-the-rule (ATR: steepest meridian 180 ± 30°), with-the-rule (WTR: 90 ± 30°), and oblique (OB: 30-60°or 120-150°). Results Mean age, AL, and ACD were 72.28 ± 13.84 years, 23.99 ± 1.85 mm and 3.08 ± 0.52 mm, respectively. In all, 20.4% eyes had ≤ 0.50 diopters (D), 55.2% had 0.51-1.50 D, 7.9% had 2.01-3.00 D, and 3.7% eyes had 43.00 D of astigmatism. Overall, 44.2% of eyes had corneal astigmatism 41.00 D. Average astigmatism in age ranges 40-49, 50-59, 60-69, 70-79, 80-89, and 90+ years were 0.82, 1.04, 1.04, 1.02, 1.15 and 2.01 D, respectively. The magnitude of preoperative astigmatism positively correlated with age (Po0.0001), with increasing and decreasing prevalence of ATR and WTR astigmatism, respectively, with advancing age. The magnitude of ATR astigmatism inversely correlates to AL (Po0.0001). ATR astigmatism is more prevalent with increasing magnitude of astigmatism (Po0.0001). Conclusions A majority of patients for cataract surgery have astigmatism between 0.51 and 1.5 D. ATR astigmatism increases, whereas WTR decreases with age. ATR astigmatism inversely correlates to AL. With increasing age, the magnitude of astigmatism increases and ATR astigmatism becomes increasingly prevalent. The likelihood of a patient requiring astigmatic correction increases with age.

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Analysis of corneal astigmatism in cataract surgery candidates at a teaching hospital in Shanghai, China

Abstract: No author has a financial or proprietary interest in any material or method mentioned.

Cited by 52 publications

References 16 publications

Comparison of corneal astigmatism measurements of 2 optical biometer models for toric intraocular lens selection

Comparison of corneal astigmatism measurements of 2 optical biometer models for toric intraocular lens selection

Prevalence of corneal astigmatism and axial length in cataract surgery candidates in Turkey

Relationship between age, corneal astigmatism, and ocular dimensions with reference to astigmatism in eyes undergoing routine cataract surgery

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