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Changing accommodation behaviour during multifocal soft contact lens wear using auditory biofeedback training.

Sandra Wagner1, Frank Schaeffel2, David Troilo3

  • 1Institute for Ophthalmic Research, Eberhard Karls University Tuebingen, Elfriede-Aulhorn-Str. 7, 72076, Tuebingen, Germany. sandra.wagner@uni-tuebingen.de.

Scientific Reports
|March 21, 2020
PubMed
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Auditory biofeedback training can improve eye accommodation accuracy for individuals wearing single vision (SV) and multifocal soft contact lenses (MFCL). This training shows promise for enhancing myopia control treatments in children.

Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Biofeedback training utilizes sensory signals to modulate autonomic functions, aiding in managing conditions like anxiety.
  • Multifocal soft contact lenses (MFCLs) are an effective treatment for slowing myopia progression in children.
  • Previous research suggests that the accommodative response to near stimuli may be altered with MFCL wear, potentially impacting therapeutic efficacy.

Purpose of the Study:

  • To investigate the efficacy of auditory biofeedback in improving accommodative responses in individuals wearing single vision contact lenses (SVCLs) and MFCLs.
  • To assess whether biofeedback training can reduce accommodative lag, particularly in the context of MFCL wear.
  • To explore the potential of biofeedback as an adjunct therapy for myopia management.

Main Methods:

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  • Participants (emmetropes and myopes) underwent accommodation accuracy assessment while wearing SVCLs and MFCLs (centre-distance).
  • Short-term auditory biofeedback training was administered to encourage improved accommodative responses (reduced lag).
  • Accommodation was re-assessed after the biofeedback intervention with both lens types.

Main Results:

  • Significantly greater accommodative lags were observed when participants wore MFCLs compared to SVCLs.
  • Auditory biofeedback training successfully reduced accommodative lag by at least 0.3D in both SVCL and MFCL wearers.
  • The biofeedback training demonstrated greater effectiveness in myopic individuals wearing their habitual SVCLs.

Conclusions:

  • Accommodative responses can be modified through brief biofeedback interventions, irrespective of refractive status.
  • This proof-of-concept study suggests that biofeedback training may enhance the effectiveness of MFCLs in managing myopia progression in children.
  • Further research is warranted to explore the clinical application of biofeedback in pediatric myopia control.