Hyperopia

Vision problems > Hyperopia

Hyperopia

What is Hyperopia?

Hyperopia is a refraction defect or an error of the visual focus in which the images are focused behind the retina, rather than in the retina; hence that farsighted people have blurred vision and certain discomfort when looking at close-up objects. This ametropy can be caused by the fact of having eyes too short in the anterorposterior axis or having the cornea too flat.

 

Hyperopia is a frequent vision problem or defect. It does not usually reach many dioptres, yet, unlike myopia, it is not a progressive defect. The probability of having hyperopia is high when there is a family history. Hyperopia is also a risk factor to suffer from strabismus (eye deviation) and glaucoma (high intraocular pressure).

Many children are born hyperopic (physiological hyperopia). Hyperopia corrects as children grow and the eyes develop, until disappearing in adolescence. However, if it has not corrected completely having reached this age, it is likely for the hyperopia to be manifest. It is important for children to have check-ups, as high hyperopias that are not detected in time can develop into strabismus or amblyoplia (lazy eye).

What symptoms does it produce?

The main symptom of hyperopia is a blurred close-up vision although in the cases of high hyperopia, the person may also see blurred far away. On the contrary, when the hyperopia is low the person can see properly close up and not have symptoms, and even carry out visual efforts for hours, such as reading or being in front of the computer. 

Normally, sustained efforts on close-up, can trigger eye strain, discomfort, even head ache. This discomfort results in a difficulty to concentrate and maintain a clear vision while reading, as well as having eyes irritated, itching and tearing after performing a task.

In children, the capacity to accommodate the lens is greater than for adults, for which this is usually sufficient to compensate low hyperopias and be able to focus close-up objects correctly.

 

How is it treated?

Correcting hyperopia is more complicated that correcting myopia. This is going to depend on the age, the degree of hyperopia and especially on the symptoms. It is corrected with glasses or contact lenses, made with convergent lenses (positive) that take the image to the retina.

Hyperopia can be operated either by means of corneal surgery with Excimer-femtosecond Laser or with Phakic lenses, which are lenses placed between the cornea and the lens in a reversible way.

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Hyperopia is a refraction defect or error in the visual focus that causes blurred vision and a certain discomfort when looking at close-up objects. 

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