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Profile of off-axis higher order aberrations and its variation with time among various refractive error groups

Krupa Philip1, Padmaja R Sankaridurg2, Jit B Ale3

  • 1School of Optometry and Vision Science, University of New South Wales, Sydney, Australia.

Vision Research
|September 12, 2018
PubMed

Insights

Peripheral higher order aberrations (HOA) in children

Area of Science:

  • Ophthalmology and Optometry
  • Pediatric Eye Research

Background:

  • Peripheral higher order aberrations (HOA) are crucial for understanding visual quality.
  • Previous studies have primarily focused on central eye aberrations, with less known about peripheral HOA in pediatric populations.

Purpose of the Study:

  • To investigate the longitudinal changes in peripheral higher order aberrations (HOA) in children.
  • To analyze the relationship between refractive error and peripheral HOA over time.

Main Methods:

  • Utilized a Shack-Hartmann aberrometer to measure peripheral HOA at 30° temporal, nasal, and inferior visual fields in 646 children.
  • Collected data at baseline and a five-year follow-up, assessing refractive error changes.

Main Results:

  • Coma and 3rd order aberrations increased with eccentricity in all participants.
  • Hyperopic eyes showed more positive C(4,0) at the periphery.
  • Horizontal coma changed significantly over five years, becoming more negative nasally and positive temporally, irrespective of refractive error changes.

Conclusions:

  • Peripheral HOA, particularly coma, change with age and eye growth in children.
  • These longitudinal changes suggest variations in the peripheral cornea and crystalline lens shape or optical component alignment.
  • Understanding these peripheral optical changes is vital for pediatric eye care and myopia progression research.

Keywords:
Higher order aberrationsMyopiaOff-axis aberrationsShack-Hartmann aberrometer

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