Longsightedness is also known as Hypermetropia. It is one type of refractive error or eye power. The others are Myopia and Astigmatism. Here one cannot see both distant objects as well as nearby objects clearly. Corrective lenses which correct this type of eye power are plus lenses.
All newborns have hypermetropia or a plus eye power. As they grow a process of emmetropization occurs. In this process, the plus eye power reduces gradually to reach zero eye power.
Hypermetropia occurs when the rays of light entering the eye meet behind the retina. The image of what the person sees is thus blurred. To see a clear image the rays of light must focus on the retina. This happens when the eyeball is shorter than what it should be or the parts of the eye which are responsible for bending the rays of light are not able to do so.
Following are the causes of hypermetropia
Hyperopia can be classified in various ways
Hyperopia may also be categorized by the degree of refractive error:
Hyperopia may also be classified by the role of accommodation to visual functioning.
Hyperopia may also be categorized based upon the outcome of non cycloplegic and cycloplegic refractions.
Hypermetropia is a refractive error. We are able to diagnose hypermetropia during a routine eye examination. First, the vision or visual acuity is recorded. Then the eye power. The process of finding out the eye power is known as refraction. There are two ways one can find out the power
In children when we check for eye power we have to put some eye drops which dilate the pupil. This help in the accurate measurement of eye power.
Uncorrected farsightedness can have the following
Treatment options for Hypermetropia are either wearing glasses, contact lenses or Lasik (Laser eye surgery). The lenses are plus numbered lenses.
Plus lenses correct hypermetropia. They are also known as convex lenses. These prescription glasses help relieve most of the symptoms of hyperopia.
Contact lenses can be worn instead of glasses. Unlike myopia, there are limited eye powers available for hypermetropia. There are 3 types of contact lenses. Daily, fortnightly and monthly disposable contact lenses.
Refractive surgery is a surgical technique that gets rid of glasses. Unlike myopia where high eye powers can be corrected LASIK can correct smaller amounts of hypermetropia.
In very high hyperopia one may consider getting a procedure called clear lens extraction. This is nothing but cataract surgery and here the natural lens of the eye is removed and replaced with an artificial lens. This gets rid of the need to wear high plus numbered lenses in glasses or contact lenses.
In both these refractive errors one has to wear plus numbered lenses to see clearly. Presbyopia specifically refers to people needing glasses after the age of around 42 years of age to see things clearly. As the years add on this plus numer gradually increases.
Hypermetropia or long-sightedness on the other hand means even a child has to wear plus-numbered glasses to see clearly from both far and near.
One can safely say that all eye clinics and hospitals can treat hypermetropia. As mentioned earlier it is an eye power and forms the most basic part of an eye examination or consultation.
Eye Solutions is an eye hospital in Mumbai that is able to offer the entire range of treatments for Hypermetropia. Our optometrists are postgraduates and have specialized in retinoscopy and pediatric refraction.
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