Visibility

A peer-reviewed quarterly publication dedicated to professional education for optometrists, vision scientists, occupational therapists, ophthalmologists and other low vision practitioners.

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Free Subscription! Education and research delivered right to your inbox! Have the opportunity for correspondence CEs while receiving the latest in low vision clinical and research findings. Article categories include:

  • Clinical Practice
  • Disease etiology and diagnosis
  • Research: reviews and abstracts
  • Case studies
  • Practice management issues
  • Technology updates

Visibility (ISSN 2330-0965 – Print) (ISSN 2330-0973 – Online) is published quarterly by Envision University, 610 N. Main Wichita, KS 67203 (316) 440-1515 http://www.envisionuniversity.org (opens in new window)

Copyright © 2022 Envision University. Individual articles are Copyright © 2022 of the indicated authors, printed with permission. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording or any information storage or retrieval system, without written permission of Envision University.

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Visibility 16 Issue 1, 2022

Mental Models of Navigation and Way-finding in Unfamiliar Environments: Implications for the Design of Mobile Apps to Guide Travelers with Vision Loss

Jared Reyes, PhD; Rakesh Babu, PhD

There is a critical need for technological aids that can offer end-to-end way-finding guidance for travelers with vision loss in seamlessly navigating in indoor and outdoor environments. The purpose of this study is to develop an in-depth understanding of the cognitive strategies and adaptive processes of individuals with vision loss for way-finding tasks in indoor and outdoor environments, as well as identify affordances and constraints of existing technologies in offering seamless guidance to such users.


Visibility 16 Issue 1, 2022

Binocular Performance in Observers with Central Vision Loss

Rajkumar Raveendran, PhD, FAAO; Arun Krishnan, PhD, FAAO

Previous studies suggested that different preferred retinal locus (PRL) will be used during binocular fixation compared to monocular fixation, especially with significant changes in the non-dominant eye. The purpose of the present study is to assess the binocular/monocular performance at the binocular PRL.


Visibility 16 Issue 1, 2022

Yoga has Moderate Improvements on Quality of Life and Balance Confidence in People with Vision Impairment

Kierstyn Napier-Dovorany, OD; Audrey Tam, BS; Nicole Stoehr, MS

People with vision impairment report low levels of health-related quality of life and lower physical activity. Physical activity, including yoga exercise, is associated with improved physical health, decreased symptoms of depression and anxiety and improved quality of life. There are no studies assessing the effect of yoga on people with vision impairment. This pilot study assessed balance confidence and health related quality of life of people with vision impairment before and after completion of an 8-week yoga course.


Visibility 16 Issue 1, 2022

Evaluating a Smartphone-Based Optic Nerve Imaging Device as a Glaucoma Screening Tool in an Outpatient Clinic Setting

Zahra Markatia, BS; Benjamin Lin, MD; Ajay Mittal, BS; Victor Sanchez BA; Nikhil Patel, BS; Rafael Robles, BS; C. Richard Blake, MD; Siva Iyer, MD; Mark Sherwood, MD

Ideally, population based eye screening could be performed by a layperson with minimal training at low cost with image interpretation being performed at telemedicine grading centers. This would be particularly useful in underserved communities in order to identify high risk individuals and best optimize delivery of ophthalmic care. This study aims to evaluate a cellphone based ophthalmoscope, D-EYE, as a potential screening device for glaucoma.


Visibility 16 Issue 1, 2022

Outcomes Following use of Smartphone Visual-assistive Applications in Seniors with Low Vision

Jeffrey Ho, OD; Ava K. Bittner, OD, PhD; Alexis G. Malkin, OD; Melissa Chun, OD; Cecilia Idman-Rait, MPH; Max Estabrook, BS; Nicole C. Ross

Mobile applications (apps) have become increasingly important for everyday life and can offer additional accessibility for patients with visual impairment. An increasing number of visual assistive apps are available at little or no cost, but are underutilized by seniors with low vision. We explored the outcomes these apps may have on visual ability for seniors with low vision.


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