September 2023
Volume 23, Issue 11
Open Access
Optica Fall Vision Meeting Abstract  |   September 2023
Poster Session: Development and validation of a virtual reality based toolkit to assess functional vision in Ultra Low Vision
Author Affiliations
  • Arathy Kartha
    Johns Hopkins University
  • Roksana Sadeghi
    Johns Hopkins University
  • Thom Swanson
  • Will Gee
  • Gislin Dagnelie
    Johns Hopkins University
Journal of Vision September 2023, Vol.23, 55. doi:
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      Arathy Kartha, Roksana Sadeghi, Thom Swanson, Will Gee, Gislin Dagnelie; Poster Session: Development and validation of a virtual reality based toolkit to assess functional vision in Ultra Low Vision . Journal of Vision 2023;23(11):55.

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      © ARVO (1962-2015); The Authors (2016-present)

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Ultra-Low Vision (ULV) refers to a level of vision that is ≦ 20/1600. There are a growing number of vision restoration treatments that recruit people with ULV or restore vision to the ULV level. At present, limited standardized outcome measures are available to assess visual potential before and after such vision restoration treatments. The ULV toolkit was developed as a standardized outcome measure for people with ULV. Three virtual reality (VR) based modules were developed to assess visual information gathering, hand-eye coordination and wayfinding in people with ULV. Each module consisted of a range of visually guided tasks related to activities of daily life (e.g., direction of motion of cars, flipping a light switch, boarding a train). Each correct/incorrect response was scored as ‘1’/ ‘0’. These raw scores were then analyzed to estimate item difficulty (item measure) and person ability (person measure). Item measures showed a wide range of difficulty levels that can be used to evaluate visual performance in people with ULV. Person measures were correlated with estimated logMAR visual acuity as well as completion rates, number of collisions and reaction times. This study bridges a big gap in the field of ULV where little is known about visual potential and usefulness in activities of daily life. VR provides portability and consistency for testing across participants with ULV thereby allowing for standardization of measurements across vision restoration studies.

 Funding: Funding: NEI R01EY028452 (GD), K99EY033031(AK), Research to Prevent Blindness

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