Hyperopia occurs when the eye dilates its focus because it absorbs crisscrossed light further back at the rear of the eye. Essentially, people who have this condition can see distant objects clearly, but struggle to focus on nearby objects. It is not unusual for those affected by acute focusing and straining of the eye to also suffer fatigue and headaches.
Upon reaching 40 years of age, the capacity of the eye to overcompensate for any weakness reduces radically, thus requiring the use of contact lenses or spectacles. Positive glass is used in these contact lenses, which offer a clear advantage over spectacles, because the picture enlargement created by them distracts the focus, something which is not experienced by the user when using contact lenses.