What are the causes of farsightedness?

Farsightedness is a condition in which close objects or letters cannot be seen clearly because the focus of light falls beyond the retina. People with this problem often have to stretch their arms farther apart to read or strain their eyes to focus in brighter areas. which if you use your eyes for a long time This is often followed by eye fatigue and headaches.
Farsightedness is caused by abnormal eye structure, such as a short eyeball, flat cornea, or by the lens of the eye deteriorating and losing its flexibility with increasing age, especially those aged 40 years and over. In addition, genetics and certain congenital diseases also play a role in accelerating the development of premature farsightedness.
A preliminary way to check can be done by trying to read small letters from a distance of approximately 35 - 40 centimeters. If you find that the image is so blurry, you must stretch your arm further to make it clear. or having a sudden headache while reading close-up You should undergo a thorough eye examination to determine the correct vision.
Nearsightedness and farsightedness can occur together in people who are already nearsighted and then progress to presbyopia. As a result, you cannot see clearly both near and far.

Have you ever felt that “Reading on a cell phone requires you to extend your arm farther” or “Looking close isn't as clear as usual.” These symptoms may be signs of farsightedness. It is a problem that often bothers people aged 40 and over. It is caused by abnormal eye structure, such as the eye socket being too short or too flat. causing light to concentrate behind the retina instead This article will explain what causes farsightedness problems. Along with how to check for farsightedness symptoms. And is it really possible to experience nearsightedness and farsightedness at the same time? How to treat farsightedness? Let's see!

What is farsightedness?

Farsightedness is a vision disorder caused by focused light beyond the macula and falling behind the retina. This is because the eyeball is too short or the cornea is too flat. As a result, close objects cannot be seen clearly. But the distance is usually clear. This condition can be found at any age and affects everyday activities such as reading or using a mobile phone. If left untreated, it can cause fatigue and headaches from focusing.

Types of hyperopia

Congenital farsightedness (Hyperopia) is caused by abnormal eye structure since birth. Often cannot see clearly or blurry both near and far if the eyesight is high In children, compensatory focusing often causes headaches, eye fatigue, and the risk of squint or lazy eye if not corrected.
Presbyopia is caused by the natural deterioration of the corneal lens and eye muscles. Symptoms usually begin after age 40 because the eye's lens lacks flexibility. This makes it more difficult to focus close-up. This condition can happen to anyone. Regardless of whether you originally had nearsightedness, farsightedness, or astigmatism.

What Causes Farsightedness?

Eye Shape

A shorter-than-normal eye shape is the main cause of congenital farsightedness. When the eyeball is nearsighted, light falls behind the retina. Although distant vision is clear, close vision requires significant strain. This is often inherited. If left uncorrected in children, it can lead to strabismus or amblyopia (lazy eye).

Corneal Abnormalities

Corneal abnormalities occur when the cornea is too flat or has insufficient curvature, reducing its refractive power. The focal point shifts behind the retina, resulting in blurry vision at close range, such as reading or using a mobile phone.

Lens Problems

Lens problems develop with age (approximately 40 years and older). The lens begins to harden and lose its flexibility, making it difficult to focus on near objects, also known as presbyopia (age-related farsightedness). In addition, chronic diseases such as diabetes or certain medications can cause premature lens degeneration.

Eye Usage Habits

Although farsightedness is primarily caused by eye structure, inappropriate habits can accelerate eye strain and worsen symptoms, interfering with daily life. For example

Staring at computer or mobile phone screens for many hours continuously without breaks.
Reading in insufficient light. This causes the eye muscles to work harder.
Not wearing corrective glasses forces the eyes to constantly compensate by straining.
Using a mobile phone while lying down in an unnatural position increases stress and fatigue on the eyes.

Symptoms of farsightedness to watch for

Difficulty seeing close objects clearly; blurry text; needing to extend your arm or move your phone further away to see clearly.
Squinting or straining your eyes; feeling that you need more eye effort than usual to focus on close objects; images appear double or blurry if you don't squint.
Eye fatigue and irritation; eye pain or burning sensation after prolonged computer or mobile phone use, especially in low light.
Headaches, often in the forehead or temples, after working on documents or staring at a screen for extended periods.
Need for more light; feeling that you need to increase the brightness to read clearly.
Behavior in children Children may rub their eyes frequently, squint, or try to avoid reading or writing because of eye discomfort.

Possible side effects

If farsightedness is left untreated after an eye exam, it can lead to chronic eye strain, headaches, and decreased work efficiency. Some individuals may also experience dizziness or nausea. In children, severe farsightedness can lead to amblyopia (lazy eye) or strabismus (crossed eyes), which can permanently damage vision.

How to do a basic farsightedness check

Reading distance test Try reading small text at your normal distance. If you need to move further away to see clearly, it indicates a vision problem.
Observe symptoms after use. If you frequently experience eye strain or headaches after only 20-30 minutes of close-up viewing, consult a specialist.
Light brightness Observe whether you need significantly brighter light to read.
Use online tests Try using a near card test at a distance of 35-40 cm. If you cannot read small print, you may be at risk.
Signs in those over 40 For those with pre-existing nearsightedness, if you find that removing your nearsighted glasses allows you to see clearly up close than with them on, this is a sign of presbyopia (age-related farsightedness).

Diagnosing presbyopia

Visual acuity test Test your ability to read numbers or letters at a standard distance to assess your near and far vision.
Refraction test Use instruments or trial lenses to determine your refractive error accurately for prescription glasses or contact lenses.
Overall eye health check The doctor will examine the cornea, lens, and retina under a microscope to rule out other conditions that may cause blurred vision.
Special tests Such as a detailed corneal curvature measurement to prepare for those interested in LASIK or other treatments.

Treatment Methods for Presbyopia (Long-sightedness)

Wearing eyeglasses The safest method to correct long-sightedness. These refract light to focus precisely on the retina. Options include lenses for near vision, bifocal lenses, or progressive lenses for clear vision at all distances.
Using contact lenses Suitable for those who need flexibility. Available in single-vision and multifocal types for clear vision at multiple distances.
LASIK (PresbyOND) Uses a laser to reshape the cornea, changing the light focal point, reducing reliance on eyeglasses. Suitable for individuals with stable vision and good eye health.
Intraocular lens replacement Often used in older adults or those with cataracts. This involves replacing the original lens with an artificial one that allows for multifocal vision.
Lifestyle modifications While not a permanent cure, these can help reduce eye strain. Examples include practicing the 20-20-20 rule for restful sleep and ensuring adequate lighting at work.

How to Prevent Presbyopia

Get annual eye exams, especially after age 40 or when near vision difficulties begin, to address problems promptly.
Use your eyes appropriately; avoid prolonged screen time. Try alternating between looking at distant objects and near objects, and avoid reading in low light.
Adjust your work environment with appropriate lighting and position your computer screen 50-70 centimeters away from you, at eye level.
Protect your eyes from UV radiation by wearing sunglasses outdoors. Reduce smoking and control underlying conditions like diabetes to slow eye deterioration.
Eat eye-nourishing foods, focusing on leafy green vegetables, carrots, fish rich in omega-3 fatty acids, and fruits with antioxidants to slow lens degeneration.

Can nearsightedness and farsightedness occur simultaneously?

Nearsightedness and farsightedness can occur together. This is often seen in people who already had nearsightedness and develop presbyopia (age-related farsightedness) as they age. This results in blurry vision both far and near. The belief that nearsightedness cancels out farsightedness to return to normal vision is untrue. This problem can be corrected with progressive lenses, multifocal contact lenses, or refractive surgery as recommended by an ophthalmologist.

Get your eyes checked at Vibhavadi Hospital!

If you notice changes in your vision, difficulty focusing up close, or headaches when straining your eyes, get your eyes checked at Vibhavadi Hospital! We have expert optometrists and doctors who can provide expert advice before you decide on treatment for your farsightedness, addressing the problem directly and restoring clear vision.

Summary

Farsightedness is caused by light focusing beyond the retina due to nearsightedness (short eyeball) or a very flat cornea. This results in blurry near vision and may be accompanied by headaches and eye strain. This condition can be congenital or age-related, often beginning after age 40 as the eye lens loses its flexibility. Early symptoms include needing to hold the eye further away when reading or requiring increased light exposure while working. Treatment options range from eyeglasses and contact lenses to LASIK or intraocular lens replacement, depending on the individual's needs.

In addition, regular annual eye checkups, adjustments to screen time, and consuming eye-nourishing foods are crucial to slow down long-term eye deterioration. Get your treatment and eyes checked at Vibhavadi Hospital, where we have state-of-the-art medical equipment and expert physicians. It makes the examination and correction of farsightedness smoother.

FAQ

Both congenital and age-related farsightedness usually cannot be completely corrected on its own, as it is caused by the natural degeneration of the eye's structure and lens. However, it can be corrected to restore clear vision like a normal person with glasses, contact lenses, LASIK surgery, or artificial lens replacement surgery.

Eating foods rich in vitamins A, C, E, lutein, zeaxanthin, and omega-3 helps slow down eye degeneration and protect the retina. These include dark green leafy vegetables, fatty fish like mackerel and salmon, egg yolks, carrots, pumpkin, berries, as well as nuts and grains. Combining these foods with proper eye rest will help slow down eye deterioration.

There is no fixed timeframe for how often farsightedness changes, but it is generally recommended to have regular annual eye exams to adjust treatment as needed, especially for those over 40 with age-related farsightedness. Prescription changes frequently, requiring adjustments to glasses every 2-3 years. You should see an ophthalmologist immediately if you experience blurred vision or frequent headaches.