Hyperopia (longSightedness) |
| Hyperopia or long-sightedness is a vision problem experienced by almost one-fourth of the population of Australia. It is the inability of a person to see near objects clearly; hence, one sees clearly at long distances - long-sighted.
For clear vision, the cornea and the lens must properly focus (or refract) light onto the retina. (Figure 1) If the length or the shape of the eye is not ideal, the light may get focused too late (hyperopia), i.e. behind the eye, leaving a blurred image on the retina. (Figure 2) Young people with mild to moderate hyperopia are often able to see clearly because their eyes can adjust, or accommodate, to increase the eye's focusing ability. However, at later years the eye gradually loses the ability to accommodate and blurred vision becomes more apparent.
Hyperopia is often present from birth when the eyeball is smaller, i.e. a child's eyeball. A family history of hyperopia, however, can also contribute to its development.
The most common symptoms of hyperopia are eyestrain and headaches following close work. Irritability and nervousness after prolonged concentration may also occur. |
Treatment |
| An optometrist or ophthalmologist can easily diagnose hyperopia. Once diagnosed, the treatment for hyperopia depends on several factors, including the patient's age, activities, and occupation. Glasses and Contact Lenses, which allow the light to be focused properly on the retina. (Figures 3, 4 and 5) are the most common method used to correct most hyperopia. Laser Surgery is another option, which obviates the need for glasses and contact lenses; however, it can only be used to correct low to moderate hyperopia. |
