What visual problems does monocular vision cause?
Monocular vision can cause part of image to be hidden or blurred People usually find that monocular vision will affect: • Three-dimensional vision – with binocular vision we see the height, width and depth of objects around us. We compare those dimensions with those of other objects. This enables us to recognise qualities such as distances and the sizes of objects that we are looking at. Monocular vision will affect how objects are perceived and can lead to people being seen a clumsy or accident prone. Monocular vision can make seeing steps and slopes difficult to see • All-round vision (peripheral visual field) – it is estimated that something like a fifth of the field of vision is lost. Not all of an image might be easily seen by someone with monocular vision • A partial shadow over the vision caused by the nose (known as nasal quadrant loss). • Visual acuity may be reduced – people generally see better with both eyes together than with either eye separately (known as binocular summa
