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A computerized perimeter for assessing modality-specific visual field loss.

Finnegan J Calabro1, Lucia M Vaina

  • 1Brain and Vision Research Lab, Boston University Department of Biomedical Engineering, Boston, MA, USA. fcalabro@bu.edu

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|January 19, 2012
PubMed
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A new tool, the Quadrant Vision Perimeter (QVp), rapidly measures visual field loss. It assesses specific deficits in vision, aiding in diagnosis and tracking recovery or degradation over time.

Area of Science:

  • Ophthalmology and Neuroscience
  • Medical Technology and Diagnostics

Background:

  • Visual field loss is a key indicator of neurological or retinal damage.
  • Accurate and efficient measurement of visual fields is crucial for diagnosis and monitoring.
  • Current methods may lack the ability to assess modality-specific deficits comprehensively.

Purpose of the Study:

  • To introduce and validate the Quadrant Vision Perimeter (QVp) for rapid and accurate visual field measurement.
  • To demonstrate the QVp's capability in assessing modality-specific visual field loss (luminance, motion, depth, color) and severity.
  • To compare QVp-generated visual fields with those from standardized perimeters in stroke patients.

Main Methods:

  • Development and validation of the Quadrant Vision Perimeter (QVp) tool.

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  • Normalization of visual attribute parameters for accurate assessment.
  • Comparative analysis of QVp data against standardized perimeters in three stroke patients.

    • Main Results:

    • The QVp tool demonstrates rapid and accurate measurement of visual fields.
    • The tool successfully assesses modality-specific visual deficits and their severity.
    • Exemplar comparisons show consistency between QVp and standardized perimeters in stroke patients.

    Conclusions:

    • The Quadrant Vision Perimeter (QVp) is a valuable tool for characterizing visual field loss.
    • QVp facilitates the assessment of modality-specific deficits and changes over time.
    • This technology aids in monitoring visual field changes due to recovery or degradation.