Your eye is very similar to a camera. Inside the eye there is a lens, which sits behind the pupil. The eye’s ability to focus depends on three main factors, the cornea (which is known as the “window of the eye”, the lens inside the eye and the length of the eye. The cornea and the lens should work together to focus an image on the retina at the back of the eye. However, when these three elements don’t work together eyesight problems can result.
- myopia (short-sightedness) where objects in the distance appear blurred or out of focus
- hyperopia (long-sightedness) which affects people’s ability to see objects close to them
long-sightedness often becomes more noticeable after the age of 40 and this is known as presbyopia
- astigmatism (irregular shaped eye surface). In this condition the eye surface is shaped more like a rugby ball than a football, so light of different orientations is not focused in a synchronised fashion.
- cataracts are also increasingly common with age and are cloudy patches in the lens of the eye which can make vision blurred or misty