May 2008
Volume 49, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2008
Wavefront Aberrations in the Peripheral Retina Are Different in the Eyes of Myopic and Emmetropic Young Adults
Author Affiliations & Notes
  • C. E. Beck
    New England College of Optometry, Boston, Massachusetts
  • J. Gwiazda
    New England College of Optometry, Boston, Massachusetts
  • J. He
    New England College of Optometry, Boston, Massachusetts
  • Footnotes
    Commercial Relationships  C.E. Beck, None; J. Gwiazda, None; J. He, None.
  • Footnotes
    Support  EY014817, T35EY007149
Investigative Ophthalmology & Visual Science May 2008, Vol.49, 3325. doi:https://doi.org/
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      C. E. Beck, J. Gwiazda, J. He; Wavefront Aberrations in the Peripheral Retina Are Different in the Eyes of Myopic and Emmetropic Young Adults. Invest. Ophthalmol. Vis. Sci. 2008;49(13):3325. doi: https://doi.org/.

      Download citation file:


      © ARVO (1962-2015); The Authors (2016-present)

      ×
  • Supplements
Abstract

Purpose: : To measure wavefront aberrations in the central and peripheral retina and compare the amounts and patterns in myopic and emmetropic subjects.

Methods: : The Complete Ophthalmic Analysis System (COAS) was used to measure wavefront aberrations in the eyes of 36 young adult subjects (27 females, 9 males; mean age = 23.6 yrs). 18 were emmetropic (mean Rx = -0.10 D +/- 0.31) and 18 were myopic (mean Rx = -3.32 D +/- 1.86). Mean cylinder was -0.15D. The COAS was aligned to the subject's right eye which saw a red light surrounded by concentric circles. A mirror was aligned to the left eye so that they saw a target 33 cm away with small black letters on a white background. Aberrations were measured centrally, at 10 and 30 deg nasally and 10, 20, and 30 deg temporally. Three measurements were taken at each position. Means of the three measurements were compared by position and refractive group, using repeated measures ANOVA and t-tests for total RMS, higher order (HO) RMS, and 7 Zernike aberration terms (Z2-2 ,Z22 ,Z3-3 ,Z3-1 ,Z31 ,Z33 ,Z40 ).

Results: : For total RMS aberrations, there was a significant interaction between position and refractive status (p<0.001). Aberrations were greater in the far periphery than centrally and more aberrations were found in the temporal than nasal retina. More aberrations were found in emmetropes than myopes at temporal 20 (p=0.0005) and 30 deg (p=0.0001). Higher order aberrations differed significantly across the 6 positions (p< 0.0001), with more peripheral aberrations, but there were no refractive group differences (p = 0.31) and no interaction between position and refractive group (p = 0.72). Similar to total RMS, main axis astigmatism (Z22) was greater in the far periphery than centrally, and more astigmatism was found temporally than nasally. Z22 was significantly greater in emmetropes than myopes at temporal 20 deg (p< 0.0001) and temporal 30 deg (p< 0.0001). Oblique astigmatism (Z2-2) was positive nasally and negative temporally, and was significantly greater in emmetropes than myopes at nasal 30 deg (p=0.005). Horizontal coma (Z31) was positive nasally and negative temporally, but only for emmetropes (in myopes it was positive by a small amount at all positions). For the other higher order terms there were no consistent differences between positions or between emmetropes and myopes.

Conclusions: : Emmetropes were found to have higher total RMS aberrations than myopes in the peripheral retina, mainly due to more astigmatism. The astigmatism results are consistent with Hoogerheide et. al.(1971). Peripheral aberrations are now being measured after a period of near work to see if the pattern changes in either refractive group.

Keywords: myopia • aberrations • astigmatism 
×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×