Long‑sightedness (Hyperopia)

Types of long‑sightedness 

Long‑sightedness can manifest in different ways, depending on its severity and whether the eye's focusing power can compensate. 

Latent Hyperopia

This is when the eye's natural focusing ability (accommodation) can fully correct the long‑sightedness, so you might not experience any symptoms. 

Manifest Hyperopia

This is when the eye cannot fully compensate, and you experience symptoms like blurry near vision. This can be further divided into: 

Facultative Hyperopia

Where some of the long‑sightedness can be overcome by accommodation. 

Absolute Hyperopia

Where no amount of accommodation can bring objects into clear focus. 

What causes long‑sightedness? 

Long‑sightedness is primarily caused by the shape of the eye, which affects how light is focused onto the retina. 

Shorter eyeball

The most common cause is an eyeball that is shorter than average from front to back. This means light focuses behind the retina. 

Flat cornea

If the cornea (the clear front surface of the eye) is less curved than it should be, light rays won't bend enough to focus correctly on the retina. 

Abnormally shaped lens

Less commonly, the lens inside the eye may have an irregular shape, preventing proper focusing. 

Genetics

Long‑sightedness often runs in families, suggesting a genetic link. 

Age

While long‑sightedness can be present from birth, it can also develop or become more noticeable with age, as the eye's lens becomes less flexible. This is different from presbyopia, which is specifically age‑related loss of near focusing ability. 
 
Learn more about presbyopia

Long‑sighted vs short‑sighted: What's the difference? 

It's common to confuse long‑sightedness (hyperopia) with short‑sightedness (myopia). The key difference lies in where light focuses in relation to the retina and which distances are affected. 

Long‑sighted (Hyperopia) 

Light focuses behind the retina. Distant objects are clear, but near objects are blurry. The eye is often too short or the cornea/lens is too flat. This is long and short sighted in contrast. 

Short‑sighted (Myopia) 

Light focuses in front of the retina. Near objects are clear, but distant objects are blurry. The eye is often too long or the cornea/lens is too curved. Understanding the difference between long and short sighted is crucial for correct diagnosis and treatment. 
 
Learn more about myopia (short‑sightedness)

When long‑sightedness needs medical help 

While long‑sightedness is common and usually easily corrected, severe cases, especially in children, can lead to complications like a lazy eye (amblyopia) or squint (strabismus) if left untreated. If you notice a significant change in vision, persistent headaches, or signs of a squint, seek professional advice promptly. 

Prescription glasses

The most common and straightforward treatment. Convex lenses are used to bend light rays inward, moving the focal point forward onto the retina. This corrects the blurry near vision. 

Contact lenses

An alternative to glasses, contact lenses sit directly on the eye and provide the same corrective power. They are available in various types, including daily disposables, two‑weekly, and monthly lenses. 

Refractive surgery (e.g. LASIK)

For some adults, surgical procedures can permanently change the shape of the cornea to correct long‑sightedness. This is an option for those who prefer not to wear glasses or contact lenses. 

Ortho‑K (Orthokeratology)

A non‑surgical option where specially designed rigid contact lenses are worn overnight to temporarily reshape the cornea, providing clear vision during the day without glasses or contact lenses. 

How is long‑sightedness prevented? 

While long‑sightedness is often genetic and cannot be entirely prevented, maintaining good eye health can help manage its progression and reduce associated symptoms.