May 2005
Volume 46, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2005
High Frequency Component of Accommodative Microfluctuation in Mypoes and Emmetropes
Author Affiliations & Notes
  • H. Uozato
    Ophthalmology & Visual Sciences, Kitasato Univ Graduate Sch of Medical Sciences, Sagamihara, Japan
  • T. Kawamorita
    Ophthalmology & Visual Sciences, Kitasato Univ Graduate Sch of Medical Sciences, Sagamihara, Japan
  • Footnotes
    Commercial Relationships  H. Uozato, None; T. Kawamorita, None.
  • Footnotes
    Support  Grand–in–aid for Exploratory Research of JSPS (HU), Project Research Program of the Kitasato Univ
Investigative Ophthalmology & Visual Science May 2005, Vol.46, 5589. doi:
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      H. Uozato, T. Kawamorita; High Frequency Component of Accommodative Microfluctuation in Mypoes and Emmetropes . Invest. Ophthalmol. Vis. Sci. 2005;46(13):5589.

      Download citation file:


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

      ×
  • Supplements
Abstract

Abstract: : Purpose: To investigate the high frequency component (HFC) of accommodative microfluctuations, integration of frequency spectrum between 1.0 and 2.3 Hz, and accommodative responses in myopes and emmetropes under steady state. Methods: The AutoRefractor Speedy–K® & soft program MF–1 (Righton) modified to allow high–speed recording of refraction was used to measure the HFC and static objective accommodation. Eighteen healthy volunteers (aged 20–24 years; mean 22.6+/–1.5) took part in this study. Ten eyes were emmetropia (refraction: +0.49 ∼ –0.50 D), ten eyes were low or medium myopia (refraction: –0.51 ∼ –6.00 D) and ten eyes were high myopia ( < –6.01 D). Results: For an accommodative stimulus +0.50 and 0 D, the HFC had significantly negative correlation with refractive errors (R=–0.64,–0.48). For an accommodative stimulus from –1.0 to –3.0 D, there is no statistically significant correlation between the HFC and refractive errors. Accommodative responses in high myopic group were statistically less than those in emmetropic and low or medium myopic groups (p<0.05, Scheffé test). Conclusions: We suggest that the mechanical and elastic characteristics of the ciliary muscle differ in refractive states and the HFC in myopes plays a major role in determining the optimum focus.

Keywords: ciliary muscle • refraction • myopia 
×
×

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.

×