Presentation Title

DVA: Is replicating the dynamics of the environment important or a simple eye chart will do?

Advisor Information

Mukul Mukherjee, PhD

Location

MBSC Gallery Room 308 - G

Presentation Type

Oral Presentation

Start Date

4-3-2022 2:00 PM

End Date

4-3-2022 3:15 PM

Abstract

The visual system plays an important role in maintaining balance and stability during gait. It gathers information from our environment that allows us to avoid obstacles, control our stride, and safely navigate through our surroundings through the usage of visual feedback. The visual system’s performance can be temporarily compromised from everyday tasks like during walking/running or from the natural aging process. Unfortunately, while both static and dynamic visual acuity testing examines visual acuity with various measures, they fail to incorporate a dynamic visual field with a dynamic individual. Current standards of visual acuity testing do not allow the assessment of one’s ability to interact in a real-world environment. Therefore, the purpose of this study was to observe the effect of walking surface manipulations and varied walking speeds on the performance of a modified NIH cDVA test and a novel DVA test utilizing optic flow in healthy individuals aged 19 – 35. Participants will complete two days of testing on the Computer Assisted Rehabilitation Environment that entails a familiarization trial, 3 standing conditions at 3 support surface oscillation rates, 9 randomized dynamic conditions with 3 walking speeds and 3 support surface oscillation rates, then a wash-out trial. Statistical analyses will consist of a one-way ANOVAs for the standing conditions in both blocks. Then a 3x3 repeated measures ANOVA will be completed for the dynamic conditions in both blocks. If there is an interaction between the group and condition, further analysis will be performed with Tukey’s HSD.

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Mar 4th, 2:00 PM Mar 4th, 3:15 PM

DVA: Is replicating the dynamics of the environment important or a simple eye chart will do?

MBSC Gallery Room 308 - G

The visual system plays an important role in maintaining balance and stability during gait. It gathers information from our environment that allows us to avoid obstacles, control our stride, and safely navigate through our surroundings through the usage of visual feedback. The visual system’s performance can be temporarily compromised from everyday tasks like during walking/running or from the natural aging process. Unfortunately, while both static and dynamic visual acuity testing examines visual acuity with various measures, they fail to incorporate a dynamic visual field with a dynamic individual. Current standards of visual acuity testing do not allow the assessment of one’s ability to interact in a real-world environment. Therefore, the purpose of this study was to observe the effect of walking surface manipulations and varied walking speeds on the performance of a modified NIH cDVA test and a novel DVA test utilizing optic flow in healthy individuals aged 19 – 35. Participants will complete two days of testing on the Computer Assisted Rehabilitation Environment that entails a familiarization trial, 3 standing conditions at 3 support surface oscillation rates, 9 randomized dynamic conditions with 3 walking speeds and 3 support surface oscillation rates, then a wash-out trial. Statistical analyses will consist of a one-way ANOVAs for the standing conditions in both blocks. Then a 3x3 repeated measures ANOVA will be completed for the dynamic conditions in both blocks. If there is an interaction between the group and condition, further analysis will be performed with Tukey’s HSD.