The principle of WHOeyes is based on how an eye care professional would assess visual acuity using a conventional chart in a clinical setting. The accuracy and usability of the app were tested in ...

Impaired vision and blindness are common. About 3.4 million people in the US are blind or visually impaired. Vision is usually measured by visual acuity charts, and normal vision is expressed as 20/20 ...

Caring for your eyes and vision are important parts of a healthy lifestyle. Vision screening is a simple test of your vision that can detect problems early. An eye exam is a detailed check of your ...