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[Development of a new evaluation system for visual function].

Takashi Fujikado1

  • 1Department of Visual Science, Osaka University Graduate School of Medicine, Suita, Japan.

Nippon Ganka Gakkai Zasshi
|January 20, 2005
PubMed
Summary

This study introduces new methods to objectively assess visual function, linking higher-order aberrations (HOA) to cataract and developing predictive models for vision improvement after surgery. It also presents advanced imaging and stimulation techniques for retinal disease evaluation.

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Area of Science:

  • Ophthalmology and Visual Science
  • Optical Engineering
  • Neuroscience

Context:

  • Visual deterioration stems from media opacity, retinal damage, or higher visual system disorders.
  • Objective evaluation of visual function, particularly in cataract, remains challenging.
  • Advancements in wavefront sensing offer objective measurement of ocular aberrations.

Purpose:

  • To clinically evaluate a new system for visual function assessment, focusing on media and retinal disorders.
  • To investigate the relationship between aging and ocular higher-order aberrations (HOA).
  • To explore the causes of monocular diplopia and predict visual outcomes after cataract surgery.

Summary:

  • Ocular higher-order aberrations (HOA), particularly spherical aberration and astigmatism, increase with age and contribute to visual disturbances like triplopia in early nuclear cataracts.

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  • Area Under Log Contrast Sensitivity Function (AULCSF) can be predicted using backward light scattering (BLS), forward light scattering (FLS), and HOA, enabling vision improvement prediction post-cataract surgery.
  • Developed adaptive optics (AO) fundus camera for high-resolution photoreceptor imaging, transcorneal electrical stimulation (TES) for residual retinal ganglion cell (RGC) evaluation, and a peripheral stereopsis measurement apparatus.

    • Impact:

    • Provides objective tools for assessing visual function and predicting surgical outcomes in cataract patients.
    • Enables detailed analysis of retinal structures and function, crucial for artificial retina and regenerative therapies.
    • Offers new methods for evaluating visual function in patients with retinal diseases and central scotomas.