Hypermetropia: Causes, Diagram, Symptoms and Correction

Hypermetropia is a very common vision defect in which nearby objects appear blurry, while distant objects can usually be seen clearly. It is also called farsightedness or long-sightedness and affects people of all age groups. Have you ever noticed someone holding a book farther away to read comfortably? This article provides complete explanation on what is hypermetropia, how it affects the eye, and the methods used to correct it in a simple and engaging way.

Table of Contents

• What is Hypermetropia
• Main Causes of Hypermetropia
• Major Symptoms of Hypermetropia
• How is Hypermetropia (Farsightedness) Corrected

What is Hypermetropia

Hypermetropia, which is known as farsightedness, is a common eye defect that occurs when the eyeball is shorter than normal or the cornea has too little curvature. This causes light rays entering the eye to focus behind the retina instead of directly on it. As a result, people with hypermetropia can usually see distant objects clearly, but nearby objects appear blurry. In a normal eye, light focuses properly on the retina, forming a sharp image. However, in a hypermetropic eye, improper focusing makes it difficult to see close objects clearly.

Main Causes of Hypermetropia

Hypermetropia is mainly caused by structural variations in the eye that affect the proper focusing of light on the retina. 

• The most common cause is a shorter-than-normal eyeball, where the distance from the front to the back of the eye is reduced, causing light rays to focus behind the retina. 
• Another major cause is a flattened cornea or lens, where the curvature is not steep enough to bend light correctly for clear near vision.
• Age-related changes can also contribute to vision problems similar to hypermetropia. For example, presbyopia, which usually develops after the age of 40, reduces the flexibility of the eye lens and can worsen farsightedness.
•  Genetic factors also play an important role, as hypermetropia often runs in families.
• Interestingly, many children are born with mild hypermetropia due to natural eye development. In most cases, this condition improves gradually as the eyeball grows to its normal size during childhood.

Major Symptoms of Hypermetropia

Farsightedness, which is also known as hypermetropia, is a vision condition in which nearby objects appear blurry while distant objects can be seen more clearly. The severity of symptoms may vary from person to person.

Here is some common symptoms of farsightedness,

• Blurred vision while reading or looking at nearby objects
• Difficulty focusing on close-up tasks
• Squinting to see objects more clearly
• Holding books, mobile phones, or screens farther away
• Eye strain or discomfort after reading or screen use
• Tired or aching eyes
• Frequent headaches, especially after close work
• Intermittent blurred vision, particularly at the end of the day

In children, additional symptoms may include, 

• Frequent eye rubbing
• Reduced interest in reading, drawing, or other close activities
• Difficulty concentrating on near tasks
• Crossed eyes (strabismus) in some cases

If these symptoms occur regularly, an eye examination can help identify the condition and determine the appropriate treatment.

How is Hypermetropia (Farsightedness) Corrected?

Hypermetropia, or farsightedness, is corrected by using a convex (converging) lens. This lens bends incoming light rays inward so that the image is focused directly on the retina, allowing nearby objects to be seen clearly.  Common methods used to correct hypermetropia include,

• Eyeglasses: Convex lenses in eyeglasses help focus light correctly on the retina and are the most common method of correction.
• Contact Lenses: Contact lenses provide the same correction as glasses and offer a wider field of view.
• LASIK Surgery: This laser procedure reshapes the cornea to improve the eye's ability to focus light properly.
• LASEK and PRK: These laser-based procedures reshape the cornea without creating a corneal flap and are often recommended for people with thin corneas.
• SMILE Surgery: A minimally invasive laser treatment that helps correct refractive errors, including hypermetropia.
• Intraocular Lens (IOL) Implants: In some cases, an artificial lens may be implanted inside the eye to improve vision.
• Implantable Collamer Lens (ICL): A thin artificial lens is placed inside the eye to correct moderate to severe hypermetropia, especially when laser surgery is not suitable.

The choice of treatment depends on the severity of the condition, age, and overall eye health.

so far, in this article, we learned that hypermetropia is a common vision defect in which nearby objects appear blurry because light focuses behind the retina. We also understood what is hypermetropia, its major causes, common symptoms, and the different methods used for hypermetropia correction, including eyeglasses, contact lenses, and surgical procedures.