Visibility 15 Issue 3, 2021
Do drivers with macular degeneration use advanced driver assistance systems? – A telephone questionnaire study
Jing Xu, PhD; Abbie Hutton; Güler Arsal; Rui Ni, PhD; Bradley Dougherty, OD, PhD; Alex R. Bowers, PhD
Drivers with Macular Degeneration (MD) may experience difficulties in many driving situations because of their vision loss. Recently developed advanced driver assistance systems (ADAS), including blind spot warning and forward collision warning systems, have the potential to mitigate these difficulties and maintain driving safety for these drivers. The goal of this study is to identify the driving difficulties and the perceived need and preferences for ADAS technology of drivers with and without MD.
Visibility 15 Issue 2, 2021
High Plus Lens Power Measurement Reliability in a Clinical Low Vision Setting
Bennett McAllister, OD; Frank Spors, PhD; Tyler Phan, OD
Magnifiers can be specified by magnification (M) or equivalent power (Fe). When comparing these two, Fe is the only independent and constant descriptor and therefore preferred in low vision practice. Yet, Fe in high plus lenses cannot be easily nor reliably measured with a clinical instrument, such as a lensometer. This study looks for the shortest possible distance under which unknown high plus lenses/magnifiers can be measured and still yield clinically acceptable Fe values.
Visibility 15 Issue 2, 2021
Potential Transferable Skills from Eccentric Viewing Training
Caitlin Murphy, PhD, CLVT; Hana Boxerman, MSc, CLVT; William Seiple, PhD; Ross Clark, PhD; Karen H. Li, PhD; Julie-Andrée Marinier, OD, MSc3; Aaron Johnson, PhD
Fixation stability is frequently targeted and trained in visual rehabilitation practices to improve reading accuracy and speed. However, it has yet to be investigated in terms of improvements beyond reading. Previous researchers have shown that fixation stability is a visual parameter that can contribute towards the control of balance. Therefore, improved fixation as a consequence of eccentric-viewing training may provide additional benefits in improving balance. Here, researchers collaborate with low vision rehabilitation specialists to quantify fixation stability before and after an eccentric viewing training program, and determine if this can lead to increased use of visual information to improve both reading and balance.
Visibility 15 Issue 1, 2021
Predictors of Employment Among Adults with Vision Impairment in Canada
Shikha Gupta, PhD; Walter Wittich, PhD, FAAO, CLVT; Mahadeo Sukhai, PhD
Employment is an important determinant of health and overall quality of life for individuals with vision impairment. Current evidence suggests that employment rates for people with vision impairments are lower than general population. The purpose of our research study was to identify modifiable and non-modifiable factors that contribute to positive or negative employment outcomes among adults with vision impairments.
Visibility 15 Issue 1, 2021
An examination of Fixation Stability and Balance in Vision Impairment
Sophie Hallot; Stephanie Pietrangelo, BSc; Caitlin Murphy, PhD, CLV; Karen Li, PhD; Aaron Johnson, PhD
Vision is second only to the vestibular system in terms of its contribution to balance. It is
well documented that individuals with a vision impairment often have diminished balance abilities, as assessed by self-report and physiological measures. Central vision loss, such as that in age-related macular degeneration, forces individuals to rely more on their remaining peripheral vision. This can result in lower visual acuity and less stable fixation. The purpose of this study was to determine if reduced balance and postural stability observed in vision impairment is related to unstable fixation.
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