Myopia Treatment

Myopia, or nearsightedness as it is commonly known, is a condition where the eye’s anterior-posterior axis is longer than normal or the cornea is too curved, resulting in the image being focused in front of the retina, rather than directly on it. This causes distant objects to appear blurry, while near vision is usually clear.

Once viewed as a simple refractive error, myopia is now recognized not only as a vision impairment but also as a progressive condition that increases the risk of various serious eye diseases (such as myopic maculopathy, glaucoma, cataracts, and retinal detachment) that can lead to severe vision loss. According to the World Health Organization data, it is estimated that by 2050, approximately half of the world’s population will be myopic, and one-fifth will be at risk for high myopia.

These striking figures indicate that myopia treatment, and especially myopia control, has become one of the most critical focal points of modern eye health. In this comprehensive guide, we will examine every aspect of myopia treatment, from its causes, traditional correction methods, to the revolutionary control strategies aimed at slowing its progression, and finally, permanent refractive surgical solutions.

What are the Key Factors in the Development of Myopia?

The onset and progression of myopia are based on a complex combination of biological, genetic, and environmental factors. Although it was once thought of simply as a genetic inheritance, recent research has clearly revealed the impact of environmental influences, particularly modern lifestyle, on this condition. Genetic predisposition certainly plays an important role. A child with two myopic parents is significantly more likely to become myopic than a child without myopic parents. However, genetics alone is not enough to explain the myopia epidemic.

The most emphasized environmental factors include increased near work time and decreased time spent outdoors. Especially during childhood, spending long periods working at close range with digital devices like tablets, phones, and computers can cause the eye to adapt to the constant requirement for near focus, leading to an increase in axial length (the front-to-back dimension of the eyeball). Axial elongation is the fundamental physiological mechanism of myopia and simply means the eye “grows” too much. Every millimeter of axial elongation signals a serious progression that increases the risk of vision loss. On the other hand, spending time outdoors in bright light is considered a protective factor that reduces the risk of myopia development.

The brightness of sunlight is thought to trigger the eye’s dopamine release, slowing down the biological growth rate of the eye. This explains why lifestyle interventions are so crucial in myopia control strategies. Myopia development usually begins during school age and continues to progress until the end of adolescence. Myopia that starts at an early age has the potential to reach higher degrees because the eye is exposed to progression for a longer period.

Two Main Approaches in Myopia Management: Correction and Control

Myopia treatment can be divided into two main categories: Correction and Control (Slowing Down). Correction, traditionally applied, focuses on instantly improving the blurry vision caused by myopia but does not halt the progression of the eye. Control, on the other hand, aims to slow down the rate of myopia progression, thereby reducing the total lifetime degree of myopia and the associated risk of retinal diseases.

Correction Methods: These are used to quickly restore a person’s visual acuity. The most common methods are glasses and standard contact lenses. These methods are typically used in adulthood after myopia progression has stabilized, or in childhood as an adjunct to control methods. However, there are theories suggesting that standard single-vision (monofocal) lenses can trigger myopia progression by causing the image focus in the peripheral retina to fall behind the retina (hyperopic defocus). Therefore, in the age of myopia control, the use of monofocal lenses purely for correction is increasingly being questioned in children showing progression.

Control (Slowing Down) Methods: These methods aim to prevent the degree of myopia from increasing by targeting the axial elongation of the eye. The main goal is to prevent reaching the level of high myopia (generally defined as -5.00 D and above), as high myopia dramatically increases the risk of permanent vision loss. Among the control methods proven to be most effective are pharmacological agents (Atropine) and special optical devices (Multifocal soft lenses and Orthokeratology). Modern myopia management, especially during the active progression stages of childhood and adolescence, must focus on control strategies.

Pharmacological Myopia Control: The Rise of Atropine Drops

The primary agent used in pharmacological myopia control is Atropine, an anticholinergic drug used in ophthalmology for many years. While Atropine at high concentrations (1%) can paralyze accommodation (the eye’s ability to focus up close) and pupil size, the low doses used in myopia control largely eliminate these side effects.

Low-Dose Atropine Treatment

Low-dose Atropine (in concentrations such as 0.01%, 0.025%, 0.05%) has become one of the most important myopia control breakthroughs of the last decade. The popularity of this treatment has increased due to its efficacy, safety, and relatively easy application. Although the exact mechanism of action is not fully understood, it is thought that low-dose Atropine regulates and slows the axial elongation of the eye through receptors on the scleral and choroidal tissues within the eyeball. In other words, it intervenes in the eye’s biological growth rate, preventing myopia from progressing.

Application and Protocols: Treatment is usually prescribed to school-age children showing progression, and the drop is typically administered once a day, before bedtime. The treatment duration usually lasts several years, and the ophthalmologist may gradually discontinue the treatment (tapering) until the progression is confirmed to have completely stopped. Although side effects are low, some children may experience mild light sensitivity (photophobia) or slight difficulty seeing up close. These side effects are generally tolerable or manageable with light use of glasses.

Concentration Selection: The lowest concentration, 0.01% Atropine, was initially considered the gold standard, but recent research has shown that higher concentrations such as 0.025% and even 0.05% can demonstrate greater efficacy in some children. The concentration to be used is determined by the physician based on the child’s age, baseline myopia degree, rate of progression, and individual response to side effects. The major advantage of low-dose Atropine is that it is non-invasive and can be combined with other optical control methods (such as multifocal contact lenses), which can provide a stronger control effect.

Optically Based Myopia Control Methods: Multifocal Lenses and Orthokeratology

Unlike glasses or standard contact lenses, optical methods in myopia control aim to stop eye elongation by creating a special focusing pattern in the peripheral (side) field rather than focusing the image flatly onto the retina. It is hypothesized that if the eye perceives the peripheral image focus falling in front of the retina (myopic defocus), it receives a signal to slow down growth. The two most widely used methods in this area are multifocal soft contact lenses and Orthokeratology (Ortho-K).

Defocus Incorporated Control Lenses (DFCL)

These lenses appear similar to standard soft contact lenses, but their optical designs are different. The central part of the lens corrects normal vision, while the surrounding ring-shaped zones are designed to cause the image in the peripheral field of vision to fall in front of the retina. The most common designs on the market include DIMS (Defocus Incorporated Multiple Segments) and DIFF (Defocus Incorporated Functional Forgiveness) technologies.

Multifocal Soft Contact Lenses: These lenses can slow the progression of myopia by an average of 50-60% compared to simple spectacle use. They are worn by children during the day like standard contact lenses and are generally easy to adapt to. They are a practical option, especially for children who play sports or do not want to constantly wear glasses. However, parents and children must be very careful about lens hygiene.

Orthokeratology (Ortho-K)

Orthokeratology is one of the oldest and most effective methods of myopia control and involves specially designed rigid contact lenses worn overnight.

How Does Orthokeratology (Ortho-K) Work and Who Is It Suitable For?

Orthokeratology, as the name suggests, is based on the principle of temporarily “reshaping” the cornea. Ortho-K lenses are only worn during sleep. Overnight, they apply a gentle hydraulic force on the epithelium, the outermost layer of the cornea, centralizing the flattening of the cornea, which in turn allows light to focus correctly onto the retina.

Mechanism of Action:

1. Central Flattening: The central part of the cornea flattens, correcting myopia and providing clear vision throughout the day.
2. Peripheral Myopic Defocus: The most critical control effect arises from the region around the center of the cornea becoming more curved (myopic ring). This “myopic ring” causes peripheral light rays to focus in front of the retina, triggering the biological signal that slows down the eye’s axial elongation.

Advantages and Disadvantages: The biggest advantage of Ortho-K is that it completely eliminates the need for wearing lenses or glasses during the day. This provides great comfort and freedom, especially for children and adolescents who play active sports. Its efficacy in slowing myopia progression is comparable to that of multifocal soft lenses. However, it may not be effective for high degrees of myopia or high astigmatism. The biggest challenge is hygiene; the lenses must be inserted every night, removed every morning, and cleaned and disinfected with special solutions. Insufficient hygiene can increase the risk of corneal infection, so parental supervision and the child’s sense of responsibility are important.

The Role of Lifestyle Changes and Environmental Factors

No matter how effective optical and pharmacological interventions are in myopia control, the management of lifestyle changes and environmental factors forms one of the cornerstones of treatment. These interventions have a simple yet powerful effect in delaying the onset and slowing the progression of myopia.

The Importance of Time Spent Outdoors

The most strongly proven environmental intervention is increasing the time children spend outdoors in the open air. Studies show that spending at least 90 to 120 minutes (two hours) under natural light significantly reduces the risk of myopia development. This time does not necessarily have to be in the form of organized sports activities; simply playing in the park, walking, or relaxing outdoors is sufficient. The fact that the brightness levels outdoors are much higher than indoor artificial light is the key to this protective effect.

Management of Near Work Habits

Modern education systems and digitalization have increased the time children spend reading, writing, and using screens at close range. Managing this time is vital for myopia control:

1. The 20-20-20 Rule: After every 20 minutes of near work, looking at an object 20 feet (about 6 meters) away for 20 seconds rests the eye muscles and reduces accommodation fatigue.
2. Correct Working Distance: Books and screens should be kept at least 30-40 cm away from the eyes.
3. Ergonomics and Lighting: Ensuring the work environment is well-lit and maintaining correct posture are important.

These simple lifestyle changes, when applied together with other medical treatments for myopia control, create a synergistic effect, maximizing the success of the treatment.

The Long-Term Importance of Myopia Control and High Myopia Risks

The primary goal of myopia control is not just to reduce the number on a spectacle prescription; the real aim is to prevent potential causes of blindness associated with high myopia. High myopia (generally defined as -6.00 D and above) is associated with excessive elongation of the eyeball. As the eyeball elongates, it stretches and thins the retina, choroid, and sclera layers. This stretching sets the stage for secondary eye diseases that can lead to serious and irreversible vision loss.

Major Risks Caused by High Myopia:

1. Myopic Maculopathy: The central area of the eye responsible for the sharpest vision (the macula) is damaged due to stretching and thinning. This can cause a permanent reduction in central vision abilities like reading and recognizing faces.
2. Retinal Detachment: The stretched and thinned retina is more prone to tearing or separating. Retinal detachment is a serious condition requiring immediate surgical intervention and can lead to blindness if left untreated.
3. Glaucoma: High myopia increases the risk of glaucoma, which causes damage to the optic nerve.
4. Cataracts: The higher the degree of myopia, the greater the risk of developing cataracts at an earlier age.

Myopia control treatments aim to reduce all these risks by slowing down the axial elongation of the eye. Every diopter (D) reduction achieved during childhood is a vital investment in the child’s future visual health. Therefore, starting myopia control as early as possible, during the critical window of rapid progression in preschool and early school age, is extremely important.

Refractive Surgery Options: Permanent Solutions for Adults

Myopia progression usually stabilizes in the early 20s. After this period of stabilization, patients often turn to permanent surgical solutions to eliminate dependency on glasses or contact lenses. Refractive surgery is an effective correction method rather than a “cure” for myopia. The most common refractive surgery methods are laser procedures performed on the cornea and lens implantation surgeries inside the eye.

Types of Laser Surgery: The Differences Between LASIK, PRK, and SMILE

Laser surgery applied to the cornea changes the shape of the cornea, allowing light to focus correctly onto the retina.

LASIK (Laser-Assisted In Situ Keratomileusis): LASIK is the most commonly performed laser procedure worldwide. A “flap” is created on the surface of the cornea, this flap is lifted, the underlying corneal tissue (stroma) is reshaped with a laser, and the flap is repositioned.

• Advantages: Rapid recovery (clear vision usually within 24 hours), minimum pain.
• Disadvantages: Risk of flap complications (rarely), dry eyes and night halos in some patients.

PRK (Photorefractive Keratectomy): In PRK, instead of creating a flap, the outermost layer of the cornea (epithelium) is mechanically removed, and the laser is applied directly to the stroma.

• Advantages: No flap risk, more suitable for patients with thin corneas.
• Disadvantages: Longer and more painful recovery process (discomfort lasting a few days), vision stabilization may take some time.

SMILE (Small Incision Lenticule Extraction): SMILE is a newer, minimally invasive technique. A disc-shaped piece of tissue (lenticule) is created inside the cornea using a femtosecond laser, and this lenticule is removed through a small incision on the corneal surface.

• Advantages: Biomechanically more stable corneal structure as no flap is created, lower risk of dry eye due to fewer nerves being cut, minimally invasive.
• Disadvantages: May not be as flexibly applicable to all types of myopia and astigmatism as LASIK, high learning curve.

Implantable Contact Lenses (ICL)

ICL is an excellent option for patients with very high degrees of myopia or very thin corneas where laser surgery is not feasible. In this procedure, the patient’s natural lens is preserved, and a permanent lens is placed inside the eye (between the iris and the natural lens).

• Advantages: Can correct high degrees of myopia, preserves corneal tissue, provides a permanent solution, can be removed or replaced if necessary.
• Disadvantages: It is an intraocular surgery, carrying the risk of rare intraocular complications such as cataracts or glaucoma.

Before deciding on surgery, it is vitally important to ensure that the patient’s myopia degree has remained stable for at least one year and to undergo a comprehensive eye examination. The most suitable surgical method is determined by a specialist surgeon based on the patient’s eye structure, lifestyle, and expectations.

Timing and Process of Starting Myopia Control Treatment

The success of myopia control treatment largely depends on intervening at the right time and in the right way. The most effective way to control the progression of myopia is to intervene during the period when the progression is fastest.

Timing of Treatment Initiation

Ideally, control treatment should begin as soon as myopia is diagnosed. The ages at which myopia progresses rapidly are typically between 6 and 10 years old. This early intervention period is the most critical window for halting the axial elongation of the eye. Physicians pay attention not only to the degree of myopia but also to the rate of progression. If a child’s myopia degree increases by 0.50 D or more within a year, this is considered active progression, and one of the control methods should be initiated immediately.

Management of Treatment Processes

Myopia control is a long-term management process, rather than providing an instant correction.

1. Treatment Duration: Treatment with Atropine or optical control lenses (Ortho-K, DFCL) usually lasts 3 to 5 years or continues until the child’s eye is completely stabilized.
2. Combination Therapy: In some cases, a single method may not be sufficient. Especially in rapidly progressing myopias, physicians may recommend combination therapy, such as the simultaneous use of low-dose Atropine with multifocal soft contact lenses or Orthokeratology. This synergistic approach maximizes the chance of halting progression.
3. Monitoring and Follow-up: Regular eye examinations are mandatory throughout the treatment period. Axial length measurements and refractive error changes are closely monitored. The response to treatment is evaluated during these follow-up processes, and the treatment protocol is changed if necessary.
4. Stopping Treatment (Rebound Effect): Abruptly discontinuing Atropine treatment can lead to a rapid return of myopia (rebound effect). Therefore, when the treatment is to be stopped, the dosages are usually gradually reduced over a period of months (tapering).

The full commitment of parents to this long-term treatment process and the necessity of regular follow-up is fundamental to the success of control treatments. Myopia control is not a passing fancy but a disciplined commitment to protecting the child’s future eye health.

Promising Technologies and Research in Myopia Control

The field of myopia control is constantly evolving, and researchers are working to find more effective, safer, and easier-to-use methods. The future is opening the door to innovative technologies that can support or replace existing treatments.

New Optical Devices and Smart Glasses

Myopia control glasses apply the peripheral defocus principle, similar to multifocal contact lenses, to spectacle lenses. Technologies like H.A.L. (Highly Aspherical Lenslet) and D.O.L. (Defocus Incorporated Lens) incorporate thousands of tiny, invisible focal points onto the surface of the spectacle lens, creating peripheral defocus. This is a practical and non-invasive option for children who have difficulty wearing contact lenses or do not wish to use Atropine. Research indicates that these glasses are also effective in slowing myopia progression by 50% to 60%.

Drug Development Studies

In addition to Atropine, studies on new pharmacological agents targeting other biological pathways that regulate myopia development are ongoing. These studies focus on new molecules aimed at increasing scleral strength and controlling axial elongation. These potential new drugs may offer alternatives or combination therapies with Atropine in the future.

Genetic and Biomechanical Research

A better understanding of the genetic markers and biomechanical processes of myopia will pave the way for personalized treatment. In the future, it may be possible to create a specific myopia control protocol for a child by determining their genetic risk profile. For example, if a child has the genetic profile to respond well to Atropine, this treatment may be initiated, while for another child, optical methods or a new drug may be considered more appropriate. Furthermore, ways to biomechanically stabilize the eye’s axial length using laser or minimally invasive surgical methods are also being investigated.

These continuous innovations in myopia treatment point to a hopeful future in the fight against this global vision problem. With the advancement of research, myopia will cease to be a destiny and become a condition that can be kept under control with early diagnosis and effective management. Regular ophthalmologist check-ups for early diagnosis and selection of the correct treatment option are the key to this long-term success.

How Important is Collaboration Between Physician and Patient in Treatment Selection?

Myopia control is a personalized process that requires much more than simply writing a standard drug prescription. Treatment selection depends not only on clinical data such as the child’s degree of myopia or rate of progression but also on the child’s age, maturity, the parents’ ability to adhere, and the family budget. Therefore, open communication and strong collaboration between the physician and the patient (and parents) are vital.

Factors Affecting Treatment Selection

1. Age and Rate of Progression: For myopias that start at a very young age (under 6 years) and progress rapidly, Atropine may often be the preferred initial treatment, as contact lens hygiene can be challenging for this age group.
2. Adherence to Contact Lens Use: Lens-requiring treatments like Ortho-K or DFCL demand responsibility from the child and parents to adhere to a daily hygiene routine. For families who cannot comply, glasses or Atropine may be more suitable.
3. Current Degree of Myopia: In high degrees of myopia, a combination of multiple methods (e.g., Atropine + Optical lenses) may often be recommended. Ortho-K can be technically more challenging for very high astigmatism or myopia degrees.
4. Lifestyle: For active athletes or swimmers, Ortho-K offers an ideal solution by eliminating the need to wear lenses during the day.

The physician should evaluate all these factors to present the most suitable treatment plan and answer all of the parents’ questions. Since myopia control is a marathon that will last for years, transparent dialogue about the reasons for treatment, expected outcomes, and potential challenges is essential.

Is It Possible to Delay the Onset of Myopia?

Myopia control typically begins after myopia is diagnosed, but scientific research provides strong evidence supporting the possibility of delaying or even preventing the onset of myopia. These preventive strategies rely entirely on environmental and lifestyle interventions.

Key Preventive Strategies

1. Standardization of Time Spent Outdoors: As mentioned earlier, children in preschool and school age spending at least two hours outdoors daily can be considered the most effective “vaccine” against myopia. The inclusion of more recesses or outdoor activities in school curricula is highly important in this context.

2. Limitation of Near Work Time at an Early Age: It is necessary to completely restrict screen time, especially for children under 3 years old, and to break up near work periods with frequent breaks for older children. Avoiding long, uninterrupted near work prevents the eyes from entering excessive accommodation fatigue.

3. Ergonomic Working Habits: It is important to instill the habit of keeping books or screens at least an arm’s length away from the eyes during reading and working from an early age.

Preventing myopia is better than controlling it. Therefore, even in children who are not yet myopic but are at high risk due to genetics or lifestyle, taking these preventive measures is one of the most cost-effective approaches in combating the global myopia epidemic. Parents must take a proactive role in protecting their children’s eye health and integrate these simple preventive steps into their daily lives. It should be remembered that the later myopia begins and the lower the degree it remains, the better the person’s lifelong visual health is preserved.

This comprehensive analysis clearly demonstrates that myopia treatment goes beyond a simple spectacle prescription and involves multiple advanced technologies for both controlling progression in childhood and providing permanent correction in adulthood. Myopia control not only ensures clear vision but also acts as a shield against future serious eye diseases.