Influence of refractive status and age on corneal higher-order aberration

Kiuchi, Gaku; Hiraoka, Takahiro; Ueno, Yuta; Mihashi, Toshifumi; Oshika, Tetsuro

doi:10.1016/j.visres.2020.12.007

Cited by 11 publications

(8 citation statements)

References 35 publications

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“…In concordance with previous report (24), we observed that total HOAs (0.26±0.17 μm) in hypermetropic eyes were mainly due to coma aberrations (0.15±0.15 μm). The angle kappa is known to be larger in hypermetropes compared to myopes and emmetropes, and a larger displacement of the pupillary axis from the visual axis is responsible for higher levels of coma in hypermetropic eyes (25).…”

Section: Discussionsupporting

confidence: 93%

Corneal higher order aberrations by Sirius topography and their relation to different refractive errors

Salman

Kailani

Ghabra

et al. 2022

Preprint

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Purpose: to compare the root mean square (RMS) of anterior corneal higher-order aberrations (HOAs) in patients with refractive errors.Methods: This retrospective observational study was conducted at Department of Ophthalmology, Tishreen University Hospital, Latakia, Syria. The eyes were divided into four groups based on refractive error: mild-to-moderate myopia, hypermetropia, myopic astigmatism, and emmetropic eyes as controls. The following anterior corneal HOAs were evaluated using the Scheimpflug-Placido Sirius (CSO, Italy) topographer over 6 mm pupil: Root mean square (RMS) total corneal HOAs, RMS trefoil, RMS coma and RMS spherical aberrations. Results: RMS values of total HOAs, trefoil and coma showed a statistically significant difference in all four groups (P < 0.05, all). They were lowest in the control group (0.18± 0.09, 011± 0.08 and 0.09± 0.08 μm, respectively) and highest in the myopic astigmatism group (0.31± 0.16, 0.15± 0.12, 0.17± 0.14 μm, respectively). RMS spherical aberration was lowest in the astigmatism group (0.00± 0.16 μm) with a statistically significant difference from that in the control groups (0.05± 0.07 μm, P = 0.049).Conclusion: The mean RMS values of total HOAs, trefoil and coma were highest in the astigmatism group and lowest in the control group. However, spherical aberration was minimal in the astigmatism group.

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Section: Discussionsupporting

confidence: 93%

Corneal higher order aberrations by Sirius topography and their relation to different refractive errors

Salman

Kailani

Ghabra

et al. 2022

Preprint

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“…To the best of our knowledge, the current study represents the first report on the association between corneal irregular astigmatism and the type of corneal regular astigmatism, by controlling for confounding factors. In a previous study, Kiuchi et al 29 evaluated 426 patients with AS-OCT and reported that age and the amount of corneal regular astigmatism showed significant correlations with corneal higher-order aberrations, whereas the amount of spherical equivalent and refractive status (myopia, emmetropia, or hyperopia) did not. Choi et al 30 investigated the changes in corneal higher-order aberration during amblyopia treatment, and assessed the correlation between higher-order aberration and astigmatism in hyperopic amblyopia children.…”

Section: Discussionmentioning

confidence: 99%

Comparison of corneal irregular astigmatism by the type of corneal regular astigmatism

Ueno

Nomura

Hiraoka

et al. 2021

Sci Rep

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We investigated the relation between corneal regular and irregular astigmatism in normal human eyes. In 951 eyes of 951 patients, corneal irregular astigmatism, such as asymmetry and higher-order irregularity components, was calculated using the Fourier harmonic analysis of corneal topography data within the central 3-mm zone of the anterior corneal surface. The eyes were classified by the type of corneal regular astigmatism into four groups; minimum (< 0.75 diopters), with-the-rule (WTR), against-the-rule (ATR), and oblique astigmatism. The mean age was significantly different among the four groups (P < 0.001); patients with WTR astigmatism were the youngest, followed by those with minimum, oblique, and ATR astigmatism. Significant inter-group differences were found among the four groups in asymmetry (P = 0.005) and higher-order irregularity components (P < 0.001); the largest was in eyes with oblique astigmatism, followed by ATR, WTR, and minimum astigmatism. The stepwise multiple regression analysis revealed that corneal regular astigmatism pattern significantly influenced the amount of corneal irregular astigmatism after controlling for confounding factors (P < 0.001). Corneal irregular astigmatism, such as asymmetry and higher order irregularity components, was the largest in eyes with oblique astigmatism, followed by those with ATR, WTR, and minimum astigmatism, even after adjustment for age of subjects.

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“…[ 28 ] both reported a negative significant correlation between CSA and AL, Lim and Fam [ 29 ] detected no correlations between CSA and other refractive parameters, while Gaku et al. [ 30 ] reported a positive correlation between CSA and age. Coincidentally, a large cohort of cataract surgery candidates studied by Rania exhibited a similar relationship with corneal curvature and ACD, but unlike our work, they also proved a similar relationship with age [ 31 ].…”

Section: Discussionmentioning

confidence: 99%

Correlations of Corneal Curvature with Corneal Spherical Aberration and Anterior Chamber Parameters in Eyes with Shallow Anterior Chambers

Yang

Bao

2022

Ophthalmol Ther

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Introduction: This study aimed to investigate the distribution of corneal spherical aberration (CSA) and the relationship between corneal curvature with CSA and anterior chamber parameters in age-related cataract patients with normal axial lengths and shallow anterior chambers. Methods: Preoperative data of age-related cataract patients were collected in this retrospective comparative study. According to the average corneal curvature, the eyes were divided into groups of K m \ 42 diopters (D), 42 D B K m \ 45 D, and K m C 45 D. The axial length (AL) and corneal curvature were obtained using IOLMaster. CSA, anterior chamber depth (ACD), anterior chamber volume (ACV), anterior chamber angle (ACA), and corneal diameter (CD) were acquired according to Pentacam. The above parameters were compared among the three groups. Correlation analysis was applied to these parameters. Results: The average CSA value of 753 eyes was 0.41 ± 0.27 lm, with no significant difference among the three groups. Overall, CSA was significantly correlated with corneal curvature and ACD. The comparison of ACD among the three groups showed significant differences between the K m C 45 D group, K m \ 42 D group, and 42 D B K m \ 45 D group. Corneal curvature was positively correlated with ACD, and further analysis confirmed that the relationship was significant only in the K m C 45 D group. There were statistically significant differences in CD between the three groups. A significant correlation was found in corneal curvature and CD in all eyes, which was also found in the 42 D B K m \ 45 D group and the K m C 45 D group. Concerning ACV and ACA, no correlation with corneal curvature was found. In addition, the mean ACV and ACA of the three groups did not show any significant difference. Conclusions: CSA was higher in this population and had individual variance. Compared with ACD, ACV and ACA were more stable in different corneal curvatures and more objective in representing the anterior chamber space.

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Influence of refractive status and age on corneal higher-order aberration

Cited by 11 publications

References 35 publications

Corneal higher order aberrations by Sirius topography and their relation to different refractive errors

Corneal higher order aberrations by Sirius topography and their relation to different refractive errors

Comparison of corneal irregular astigmatism by the type of corneal regular astigmatism

Correlations of Corneal Curvature with Corneal Spherical Aberration and Anterior Chamber Parameters in Eyes with Shallow Anterior Chambers

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