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Functional Visual Acuity.

Minako Kaido1

  • 1Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan.

Investigative Ophthalmology & Visual Science
|November 28, 2018
PubMed
Summary
This summary is machine-generated.

Functional visual acuity (FVA) offers a sensitive, noninvasive method to assess vision in dry eye disease (DE). This Japanese system measures visual changes over time, aiding diagnosis and treatment evaluation.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Dry eye (DE) significantly impacts ocular surface integrity and visual quality.
  • A stable tear film is crucial for high-quality retinal imaging, but sustained visual tasks can disrupt it, impairing vision.

Purpose of the Study:

  • To introduce and evaluate a functional visual acuity (FVA) measurement system developed in Japan for assessing vision in DE patients.
  • To demonstrate FVA's correlation with optical quality and its utility in detecting subtle visual changes.

Main Methods:

  • Utilized a unique, automated system to measure changes in visual acuity (VA) over time.
  • Applied the system to patients with aqueous-deficient DE and short tear breakup time DE.
  • Assessed FVA's ability to detect minimal visual deterioration and its correlation with ocular surface health and quality of life.

Main Results:

  • FVA demonstrated correlation with optical quality and effectively measured visual function related to tear stability in DE.
  • The system detected subtle visual deterioration and vision-related quality of life issues missed by conventional VA tests.
  • Expanded applications include refractive surgery, contact lens use, and various eye conditions like glaucoma and amblyopia.

Conclusions:

  • The FVA system is a simple, noninvasive, and sensitive tool for assessing vision-related symptomatology and treatment efficacy in DE.
  • FVA reflects both tear dynamics and target recognition, suggesting broader applications in visual function analysis.
  • The FVA system holds potential for global adoption in clinical practice and research.