Shortsightedness (myopia) makes it difficult to sea objects in the distance. This is simple to correct with glasses or contact lenses.
Longsightedness (hyperopia) makes it difficult to see objects that are close to you. This is easily corrected with glasses or contact lenses.
Astigmatism is a focusing error caused by a variation in the shape of the front of your eye. Again, this can be corrected with glasses or contact lenses.
Presbyopia makes it difficult specifically at reading distance. Presbyopia usually developes between the ages of 40 and 65 and is a normal part of ageing. Glasses or contact lenses can restore normal vision.
Amblyopia is sometimes known as ‘lazy eye’ and means that the vision from one eye is not sending effective messages to the brain. Untreated amblyopia in children can lead to permanent vision problems. The earlier that it is detected, the easier it is to treat.