Print Page Text Only
  • Other eye conditions
View more pages

Other eye conditions

Other eye conditions

  • What is Colour Blindness? Open

    Colour blindness, also known as colour vision deficiency means that some people can’t see some colours clearly and accurately. As an example, reds, oranges, yellows, browns and greens may all appear to be a similar colour to someone with a red-green deficiency. Other types of colour vision deficiency may make it difficult to identify pale or deep colours, particularly if the light is poor. In many cases, completely different colours may appear to be the same – for example, people could confuse red with black. Colour vision deficiency is often referred to as colour blindness. However, in true colour blindness, no colour can be seen at all. As this is very rare, colour vision deficiency is a more appropriate description. Colour vision deficiency can vary in severity. Some people are unaware they have a colour deficiency until they have a colour vision test. Find out all about colour vision here.

  • What is Nystagmus? Open

    Nystagmus is continuous uncontrolled movement of the eyes. The movements are usually side to side but can also be up and down or rarely in a circular motion. Most people with nystagmus have reduced vision. Nystagmus may be caused by a problem with the way the eye sends messages back to the brain or how certain parts of the brain make sense of this information. These parts of the brain deal with eye movement. Find out more about Nystagmus here.


  • What is Blepharitis? Open

    Blepharitis is a condition where the edges of the eyelids become inflamed (red and swollen). It is a common condition, accounting for an estimated 1 in 20 eye problems reported to GPs. Blepharitis can develop at any age, but is more common in people over 40. Signs of blepharitis can include:

    • itchy and sore eyelids
    • eyelids that stick together and are difficult to open, particularly when you wake up
    • eyelashes that become crusty or greasy

    Find out more about blepharitis here.