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Ocular anatomic changes for different accommodative demands using swept-source optical coherence tomography: a pilot study

  • José J. Esteve-TaboadaEmail author
  • Teresa Ferrer-Blasco
  • Miguel A. Aloy
  • José E. Adsuara
  • Pablo Cerdá-Durán
  • Petar Mimica
  • Robert Montés-Micó
Cornea

Abstract

Purpose

The purpose of our study was to assess the changes in ocular parameters for different accommodative demands using a new optical biometer based on swept-source optical coherence tomography (SS-OCT).

Methods

Seven subjects were included in this pilot study, and only one eye per participant was analyzed. Each eye was measured six times with the optical biometer IOLMaster 700 (Carl Zeiss Meditec, Jena, Germany). As this instrument is not able to change the vergence of the stimulus, to enable measurements at different accommodative states, a tilted first-surface mirror attached to the optical biometer was used to place the fixation stimulus at different vergences. Measurements were taken on the right eye of the subject while the left eye was looking through the mirror. Central corneal thickness (CCT), anterior chamber depth (ACD), lens thickness (LT), axial length (AL), white-to-white (WTW) distance and keratometric readings were evaluated for three different accommodative states: 0.0 diopters (D), 1.5 D, and 3.0 D.

Results

No statistically significant differences were found for CCT, AL, WTW, K1 and K2 between the three accommodative states. As expected, changing the accommodative condition did not change CCT, AL, WTW, and keratometric outcomes. Nevertheless, statistically significant differences between the accommodative states were found for ACD and LT measurements. In addition, variations in ACD correlated linearly with variations in LT (R2 ≥ 0.99) when changing the vergence of the optotype.

Conclusion

A practical methodology to assess the changes in ocular parameters for different accommodative demands using the IOLMaster 700 based on SS-OCT has been described. Statistically significant changes that have been found that agree well with previous reports.

Keywords

Optical coherence tomography Accommodation Anterior chamber 

Notes

Funding

The Spanish Government provided financial support in the form of research grant funding (Explora project, reference SAF2013–49284-EXP). The sponsor had no role in the design or conduct of this research.

Compliance with ethical standards

Conflict of interest

All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers’ bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations, knowledge or beliefs) in the subject matter or materials discussed in this manuscript.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent was obtained from all individual participants included in the study.

Supplementary material

417_2017_3801_MOESM1_ESM.docx (11 kb)
ESM 1 (DOCX 10 kb)

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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  1. 1.Department of Optics and Optometry and Visual ScienceUniversity of ValenciaBurjassotSpain
  2. 2.Department of Astronomy and AstrophysicsUniversity of ValenciaBurjassotSpain

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