Study of ocular aberrations with age

Athaide, Helaine Vinche Zampar; Campos, Mauro; Costa, Charles

doi:10.1590/s0004-27492009000500003

Cited by 23 publications

(11 citation statements)

References 21 publications

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“…Additionally, most previous studies on wavefront aberrations were done in older subjects. Some previous studies found that higher‐order aberrations and spherical aberration increased with age from childhood to advanced age due to changes in the lens; 14,15,17 however, Brunette and colleagues 24 found that higher‐order aberrations and spherical aberration initially decreased with age, reached a minimum level during the fourth decade of life and then increased. In this present study, a narrow age band was used to minimise the confounding effect of age on wavefront aberrations.…”

Section: Discussionmentioning

confidence: 93%

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Relationship between ocular wavefront aberrations and refractive error in Chinese school children

Zhou

Chen

et al. 2012

Clinical and Experimental Optometry

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Background:The relationship between ocular wavefront aberrations and refractive error in children's eyes remains controversial. The purpose of this study is to re-examine this relationship in Chinese school children under natural distance accommodation. Methods: Ocular wavefront aberrations were measured in 86 Chinese children with spherical equivalent refraction (SER) between +0.5 D and -6.0 D and astigmatism less than -1.00 D. Wavefront aberrations were calculated using an objective method based on the Hartmann-Shack principle. Refractive error was obtained using a phoropter after cycloplegia. Subjects were categorised into three groups based on the mean SER: emmetropia (SER from -0.50 D to +0.50 D), mild myopia (SER greater than -0.50 D to -3.00 D) and moderate myopia (SER greater than -3.00 D to -6.00 D). Of the 86 participants, 22 were emmetropic, 43 were mildly myopic and 21 were moderately myopic. The root mean square (RMS) values of higher-order aberrations, Zernike coefficients (third-, fourth-and fifth-order aberrations) and R j (the ratio of third-, fourth-or fifthorder aberrations to total higher-order aberrations) were compared across the three refractive groups. Results: No significant correlations were found between the RMS values of total higherorder aberrations, third-order aberrations, fourth-order aberrations, fifth-order aberrations, spherical aberration or coma and SER. No significant differences in the RMS values of total higher-order aberrations or Rj were observed among the groups. The difference in fifth-order aberrations was statistically significant among the groups (p = 0.022); no other differences in higher-order aberration were found. Aside from C (3,1), no other differences were observed for Zernike coefficients. Conclusion: Ocular wavefront aberrations are similar among Chinese school children with different refractive errors under natural accommodation for a distance target. There is no evidence that myopes have a different amount of ocular higher-order aberrations than emmetropes.

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Section: Discussionmentioning

confidence: 93%

“…A wide age range of subjects might have been a confounding factor in previous experiments, as ocular wavefront aberrations vary with age 13–17 . Furthermore, wavefront aberrations also vary with accommodation, with a typical trend towards negative spherical aberration during accommodation 18–20 .…”

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confidence: 99%

Relationship between ocular wavefront aberrations and refractive error in Chinese school children

Zhou

Chen

et al. 2012

Clinical and Experimental Optometry

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“…Traditional corneal refractive surgery may correct low order aberrations, such as myopia, hyperopia and astigmatism, but higher-order aberrations, which cause adverse symptoms, including night vision decline, glare, halos, and visual Journal of Biosciences and Medicines discoloration, are not corrected in some patients with surgery [11] [12]. For this reason, individualized corneal refractive surgery guided by wavefront has been performed, and the adverse symptoms mentioned above have been improved.…”

Section: Discussionmentioning

confidence: 99%

Study on the Corneal Higher-Order Aberrations and Correlation in Patients with Different Degrees of Myopia Suitable for Wavefront-Guided FS-LASIK

Wu¹,

Cui²,

Li³

et al. 2020

JBM

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Background: Individualized corneal refractive surgery requires an understanding of the basis of higher-order aberrations before surgery. To investigate the characteristics and distribution of anterior surface wavefront aberrations in patients suitable for corneal refractive surgery. Methods: A total of 121 myopic patients (121 eyes, 18-45 years old) who underwent corneal refractive surgery were recruited from January to May 2016 at Affiliated Hospital, Yanbian University. Patients were randomly selected by the Pentacam anterior segment analysis system with a spherical equivalent (SE) of −0.25 to −10.00 D. The corneal anterior aberrations (total higher-order aberration; spherical aberration; Coma; Trefoil) and Q and K values were detected, and a correlation analysis of the relevant parameters was carried out. Results: The root-mean-square (RMS) of the third to sixth order aberrations of the corneal anterior wavefront aberrations at a 6 mm analysis diameter showed a decreasing trend in patients suitable for the corneal refractive surgery, and the RMS of the third order aberrations accounted for 62.92% of the total HOAs. The coma ratio (coma/total cornea higher-order aberrations) was increased with the increasing diopters, while the spherical aberration ratio (spherical aberration/total cornea higher-order aberrations) was not changed. In addition, the spherical aberration was 0.203 ± 0.082 μm (range: 0.061 to 0.503 μm), and the Q 30 was −0.19 ± 0.03 (range: −0.58 to 0.31). There were significant differences in the coma aberrations of preoperative corneal anterior surface (3, 1) between the low, middle and high myopia groups (P = 0.013). The spherical equivalent was positively correlated with the corneal coma of the anterior corneal surfaces (R = −0.241, P = 0.009), and the Q value was positively *Chengzhe Wu and Xun Cui contributed equally to this research.

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Section: Discussionmentioning

confidence: 99%

Study on the corneal higher-order aberrations and correlation in patients with different degrees of myopia suitable for wavefront-guided FS-LASIK

Cui

et al. 2019

Preprint

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Background: To investigate the characteristics and distribution of anterior surface wavefront aberrations in patients suitable for corneal refractive surgery. Methods: A total of 121 myopic patients (121 eyes, 18-45 years old) who underwent corneal refractive surgery were randomly selected by the Pentacam anterior segment analysis system with a spherical equivalent (SE) of -0.25 to -10.00 D. The corneal anterior aberrations (total higher-order aberration; spherical aberration; Coma; Trefoil) and Q and K values were detected, and a correlation analysis of the relevant parameters was carried out. Results: The root-mean-square (RMS) of the third to sixth order aberrations of the corneal anterior wavefront aberrations at a 6mm analysis diameter showed a decreasing trend in patients suitable for the corneal refractive surgery, and the RMS of the third order aberrations accounted for 62.92% of the total HOAs. The coma ratio (coma/total cornea higher-order aberrations) was increased with the increasing diopters, while the spherical aberration ratio (spherical aberration/ total cornea higher-order aberrations) was not changed. In addition, the spherical aberration was 0.203±0.082 μm (range: 0.061 to 0.503 μm), and the Q30 was -0.19±0.03 (range: -0.58 to 0.31). There were significant differences in the coma aberrations of preoperative corneal anterior surface (3, 1) between the low, middle and high myopia groups (P=0.013). The spherical equivalent was positively correlated with the corneal coma of the anterior corneal surfaces (R=-0.241, P=0.009), and the Q value was positively correlated with the total higher-order aberrations (R=0.326, P<0.001). Conclusions: Individual wavefront aberrations on the anterior surfaces of the cornea are comparatively different, and the Zernike coefficients are related to the degree of myopia. Spherical aberrations are the most overriding aberrations of the cornea.

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Study of ocular aberrations with age

Cited by 23 publications

References 21 publications

Relationship between ocular wavefront aberrations and refractive error in Chinese school children

Relationship between ocular wavefront aberrations and refractive error in Chinese school children

Study on the Corneal Higher-Order Aberrations and Correlation in Patients with Different Degrees of Myopia Suitable for Wavefront-Guided FS-LASIK

Study on the corneal higher-order aberrations and correlation in patients with different degrees of myopia suitable for wavefront-guided FS-LASIK

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