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Portable Perimetry Using Eye-Tracking on a Tablet Computer-A Feasibility Assessment.

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A new portable visual field (VF) test using an eye-tracker and tablet computer, called Eyecatcher, shows promise for glaucoma case-finding. This method is feasible, user-friendly, and comparable to standard automated perimetry.

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eye-movementsglaucomastatic perimetryvisual fields

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Area of Science:

  • Ophthalmology
  • Medical Devices
  • Diagnostic Technology

Background:

  • Standard automated perimetry (SAP) is crucial for visual field (VF) assessment but is limited by complex, costly equipment, hindering widespread case-finding.
  • A novel, portable approach to paracentral VF assessment is needed to overcome these limitations.

Purpose of the Study:

  • To propose and evaluate a new method for paracentral visual field assessment using an inexpensive eye-tracker and a portable tablet computer, termed "Eyecatcher."
  • To compare the performance and user experience of the Eyecatcher test against traditional SAP.

Main Methods:

  • The study involved 24 eyes from 12 glaucoma patients and 12 eyes from 6 controls, tested monocularly with both Eyecatcher and SAP.
  • Participants viewed sequences of dots, with fixation points used to map visual field sensitivity.
  • The Eyecatcher test assessed a VF of approximately 20°.

Main Results:

  • Eyecatcher successfully differentiated glaucoma patients from controls, with results correlating strongly with SAP (r=0.64, P<0.001).
  • Good concordance (∼84%) was observed between Eyecatcher and SAP for corresponding VF locations.
  • Participants found Eyecatcher more enjoyable, easier, and less tiring than SAP (all P<0.001).

Conclusions:

  • Portable perimetry using an affordable eye-tracker and tablet is feasible for visual field assessment.
  • The Eyecatcher test demonstrates potential as a valuable tool for glaucoma case-finding due to its portability and user-friendliness.