ArticleClinical ophthalmology (Auckland, N.Z.)2020
Normative Values of Corneal Spherical Aberration, Pupil Size, and Other Key Refractive and Topographic Parameters in a Large Cohort of Egyptian Cataract Surgery Candidates.
Article in Clinical ophthalmology (Auckland, N.Z.), 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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7 citing papers in PubMed, 7 citations in OpenAlex.
- Monofocal intraocular lens based on the Bessel principle for improved intermediate vision: a comparative assessment.BMC ophthalmology · 2026Article
- Ethnicity-Based Differences in Corneal Asphericity: Intraocular Lens Power Calculation, Image Quality, and Visual Acuity After Cataract Surgery Using Eye Models.Clinical ophthalmology (Auckland, N.Z.) · 2025Article
- Optical quality in vitro and in vivo of an extended depth-of-focus intraocular lens with isofocal design.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2024Article
- Article
- Age-related changes in Scheimpflug corneal densitometry and their correlations with corneal topographic measurements in a healthy Chinese population.Quantitative imaging in medicine and surgery · 2023Article
- Correlations of Corneal Curvature with Corneal Spherical Aberration and Anterior Chamber Parameters in Eyes with Shallow Anterior Chambers.Ophthalmology and therapy · 2023Article
- Correlation between ocular biometric parameters and corneal endothelium in a sample of young Egyptian adults.Medical hypothesis, discovery & innovation ophthalmology journal · 2021Article
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeTo determine the spherical aberration, pupil size, and other key refractive and topographic parameters in a large cohort of Egyptian cataract surgery candidates, and to investigate any existent relations between the spherical aberration and other possibly related parameters.
methodsThis is a cross-sectional, descriptive study that was conducted at Ain Shams University Hospitals, Cairo, Egypt. The study was performed on the right eyes of 1658 cataract surgery candidates. The mean corneal spherical aberration [Z4] and the pupil diameter, both photopic [P. Pupil] and mesopic [M. Pupil], were measured by the Oculus Keratograph 3, while the white-to-white corneal diameter [WTW], average keratometric readings [average K], axial length measurements [AL] and Anterior Chamber Depth [ACD] were all obtained from the IOL Master 500.
resultsThe mean age was 65 ± 11.3 years. The mean value of the Z4 was +0.26 ± 0.12 μm [95% Confidence Interval "CI" (0.2570-0.2681)]. The mean values of the measured parameters were: P. Pupil 2.43 ± 0.87 mm [95% CI (2.3867-2.4700)], M. Pupil 4.61 ± 0.91 mm [95% CI (4.5683-4.6557)], WTW 11.72 ± 0.44 mm [95% CI (11.6969-11.7394)], average K 43.89 ± 1.89 D [95% CI (43.7938-43.9701)], AL 24.23 ± 2.21 mm [95% CI (24.1118-24.3166)], and ACD 3.16 ± 0.43 mm [95% CI (3.1414-3.1827)]. Weak statistically significant correlations were found between the Z4 and each of age (r = 0.049, p = 0.044), average K (r = 0.191, p < 0.001), and ACD (r = 0.122, p < 0.001). Multivariate analysis showed weaker relations between Z4 and both average K (beta coefficient= 0.091) and ACD (beta coefficient= 0.130), with an r
conclusionThis is the first normative data report of corneal spherical aberration [Z4], pupil size, and related refractive and topographic parameters in an old Egyptian population. The detected correlations have a weak clinical relevance and negate the existence of significant relations between the Z4 and the studied refractive and topographic parameters.
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