Hyperopia or far-sightedness is where the power or refractive strength of the eye is too weak for its length. This means that light from a far distance will focus behind the retina. Because of this it is easier to see at a far distance than at a near distance. Mild amounts of hyperopia at a young age can easily be overcome by the strong focal ability of the crystalline lens inside the eye. However, at an older age mild amounts of hyperopia cannot be overcome by the weak focal ability of the crystalline lens and this makes visual acuity blurry far away and even worse at near. High amounts of hyperopia at a young age may cause significant visual strain, headaches, avoidance of near work or an eye turn. At an older age high amounts of hyperopia cause very blurry distant visual acuity and extremely blurry near visual acuity.
To correct for hyperopia a plus lens is placed in front of the eye to converge light so that it enters the eye correctly to focus closer forward on the retina. Contact lenses do the same, but they are placed on the eye itself. LASIK removes tissue on the cornea to steepen its shape and moves the focal point further forward to focus properly on the retina.