Visual impairment, which may be defined as blindness (best vision of
≤20/200 in the better eye in the United States and <20/400 by the World
Health Organization [WHO] definition) or low vision (<20/40 in the United
States and <20/60 according to WHO), is one of the most common disabilities:
an estimated 40 million people worldwide were blind nearly a decade ago, the
time of the last accurate assessment, and 110 million people had low vision.1 Among persons older than 40 years in the United States,
937 000 people were blind and 2.4 million people had low vision in 2002.
Figures for the developing world, where approximately 90% of world blindness
exists, and the developed world are expected to increase significantly during
the next decades as the world's population ages.2
Some tools below are only available to our subscribers or users with an online account.
Download citation file:
Web of Science® Times Cited: 238
Customize your page view by dragging & repositioning the boxes below.
More Listings atJAMACareerCenter.com >
Enter your username and email address. We'll send you a link to reset your password.
Enter your username and email address. We'll send instructions on how to reset your password to the email address we have on record.
Athens and Shibboleth are access management services that provide single sign-on to protected resources. They replace the multiple user names and passwords necessary to access subscription-based content with a single user name and password that can be entered once per session. It operates independently of a user's location or IP address. If your institution uses Athens or Shibboleth authentication, please contact your site administrator to receive your user name and password.