Original articleHigher-order Aberrations in Children
Section snippets
Methods
This study was granted approval by the Institutional Review Board of The Childrens University Hospital, Dublin. Children who attended pediatric ophthalmology clinics at this hospital and the Mater Private Hospital, Dublin, were selected for inclusion in the study. They had a wide range of refractive error, but all eyes had best corrected visual acuity of 20/20 or better. Children with a history of ocular abnormality and with systemic illness were excluded from the study. A Hartmann-Shack
Results
One hundred sixty-two eyes of 82 children (40 male and 42 female) were included in the study. The mean age of the children was 6.7 years (range, 4 to 14 years). The mean manifest refractive spherical equivalent was 2.39 ± 3.35 diopters (range, −8.98 to +8.45). The mean root mean square (RMS) value of total-, third-, fourth-, and fifth-order aberrations were 0.37 ± 0.13, 0.23 ± 0.12, 0.16 ± 0.11, and 0.08 ± 0.12 μm, respectively. The mean RMS of spheric aberration (Z40), total coma (Z3−1, Z31, Z5
Discussion
Recent developments in the field of refractive surgery have been responsible largely for increased interest in higher-order aberrations because technologic advances now allow for both measurement and treatment of these refractive errors. However, the exact clinical significance of higher-order aberrations remains unclear. For many years, it has been accepted widely that these aberrations reduce retinal image quality, thereby acting as an impediment to so-called super vision.1 However, in a
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2023, Journal of OptometryCitation Excerpt :Corneal aberrations are reported to be one of the main reasons for reduced optical quality and visual function in human eyes.14 Some authors hypothesize that the relationship between refractive error and higher-order aberrations may indicate that corneal aberrations have a role in refractive error development and emmetropization. 15-19 The medical literature is still undecided as to whether corneal aberrations contribute, amongst others, to the increased risk for reduced visual acuity in former preterm low birth weight individuals.
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2016, Journal of AAPOSHigher order aberrations in a normal adult population
2015, Journal of Current OphthalmologyCitation Excerpt :Knowledge of the normal values of HOAs in the normal population can also be helpful in early diagnosis of pathologic conditions such as keratoconus. To date, few studies have examined the distribution of HOAs in different races.15,17–20 Cervino et al21 and Lim et al17 have shown the differences among some ethnic groups.