Journal article
Validation of a tablet as a tangent perimeter
AJ Vingrys, JK Healey, S Liew, V Saharinen, M Tran, W Wu, GYX Kong
Translational Vision Science and Technology | ASSOC RESEARCH VISION OPHTHALMOLOGY INC | Published : 2016
DOI: 10.1167/tvst.5.4.3
Open access
Abstract
Purpose: To describe a tangent perimeter developed on an Apple iPad (Melbourne Rapid Field, MRF). Methods: The MRF assays 66 locations over 28° × 18° by having the patient vary fixation. Spot size and background luminance are paired to yield constant thresholds across the field. Spot locations were selected after analysis of 360 patient records. The capacity of the MRF to detect defects was verified in five participants (age 22–28 years) by simulating four common losses: central, arcuate, quadrant, and hemianopia. We also consider the effect of: myosis, blur (+3 DS), viewing distance (25–75 cm), ambient light (4–600 lux), and retest repeatability (1-week apart) on thresholds. Group means [SE..
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Funding Acknowledgements
A.J. Vingrys, Director of GLANCE Optical, the production company for Melbourne Rapid Fields software; J.K. Healey, None; S. Liew, None; V. Saharinen, None; M. Tran, None; W. Wu, None; G.Y.X. Kong, Director of GLANCE Optical, the production company for Melbourne Rapid Fields software; received seed funding from AMP Tomorrow Maker Foundation (Australia, not-for-profit)