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Related Experiment Videos

Accommodative microfluctuation in asthenopia caused by accommodative spasm.

M Kajita1, M Ono, S Suzuki

  • 1Department of Ophthalmology, Fukushima Medical University School of Medicine, Fukushima City, Japan.

Fukushima Journal of Medical Science
|January 5, 2002
PubMed
Summary
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Diagnosing accommodative spasm eye fatigue is challenging. New analysis of accommodative microfluctuation spectral power reveals differences in subjects with asthenopia, suggesting ciliary muscle overactivity.

Area of Science:

  • Ophthalmology
  • Vision Science
  • Biomedical Engineering

Background:

  • Patients frequently report eye fatigue due to accommodative spasm.
  • Objective diagnostic methods for accommodative spasm are currently lacking.

Purpose of the Study:

  • To analyze the spectral power of the high-frequency component (HFC) of accommodative microfluctuation.
  • To investigate the relationship between spectral power of HFC and asthenopia in subjects.

Main Methods:

  • Accommodative microfluctuations were recorded while subjects viewed a stable target.
  • Fast Fourier Transform (FFT) analysis was applied to the accommodative microfluctuation waves.

Main Results:

  • The spectral power of HFC for a distant target was 50-60 in normal subjects.

Related Experiment Videos

  • Subjects experiencing asthenopia exhibited higher spectral power of HFC compared to normal subjects.

    • Conclusions:

    • The findings suggest that the ciliary muscle remains active in asthenopia associated with accommodative spasm, even during distant viewing.
    • This objective measure may aid in diagnosing accommodative spasm and related eye fatigue.