Convergence insufficiency (CI) is a binocular vision disorder in which the eyes are unable to work together properly when focusing on near objects. This condition can lead to symptoms such as eye ...

A person with convergence insufficiency has trouble getting the eyes to work together to focus on an object, resulting in difficulty with close-up tasks. Researchers do not know what causes the ...

Exophoria is the term for one eye drifting uncontrollably outwards. Exophoria may cause blurred or double vision, eye fatigue, and difficulty focusing on objects. Exophoria is a problem with eye ...

Szonya Durant works for Royal Holloway, University of London and consults for Paravizion Ltd. She received funding from the EPSRC and the US Air Force Office of Scientific Research. For most of human ...