Understanding Myopia in Children and Teens

What happens when a child develops myopia

Myopia develops when your child's eyeball grows too long from front to back, or when the cornea curves too steeply. This structural change prevents light from focusing on the retina directly. Light rays meet in front of the retina instead and create a blurred image for distant objects while near vision remains clear.

The condition appears between ages 6 and 14 typically. Peak incidence occurs between 8 and 10 years. Around 5% of preschoolers have myopia. This increases to 9% in school-aged children and 30% in adolescents. Children who spend extended time looking at close-range objects experience a problem: much of the image fails to focus on the retinal edges properly. This blurred peripheral image triggers the eye to elongate, which increases myopia levels.

Your child's eyes don't need stronger glasses over time simply. The eyeball elongates physically and causes the retinal layers to stretch and thin. This thinning makes the eye vulnerable to complications later in life structurally, even after refractive correction with surgery.

Why myopia progresses during childhood

Myopia progression follows predictable patterns during growth years. Children aged 7-9 and 10-12 experience the fastest progression rates at -0.43D and -0.42D per year. Age serves as the most important factor that determines progression speed. About 33.1% of children aged 7-9 years and 29.4% aged 10-12 years are classified as fast progressors.

Girls show faster progression than boys slightly, though the difference amounts to only 0.18D over six years. Children with higher baseline myopia progress faster. Starting myopia at a younger age predicts eventual high myopia development. Children with prescriptions between -4.00D and -6.00D at baseline face a 58% risk of developing high myopia within 5.5 years.

Genetic factors play a substantial role. Children with one myopic parent face incident myopia rates of 21.4%, compared to 7.8% for those with no parental myopia. When both parents have myopia, children show increased progression rates of 0.63 diopters per year versus 0.42 diopters per year for those without myopic parents.

Environmental influences contribute substantially. Children who spend more time indoors and perform near-focused activities like computer work, video games, and reading show higher myopia rates than those who spend more time outdoors. The COVID-19 pandemic showed this connection dramatically. Myopia prevalence in children doubled during home quarantine and school closures reportedly.

Long-term risks of high myopia

High myopia, defined as -6.00 diopters or greater, or axial length exceeding 26.5mm, creates higher risks for sight-threatening complications exponentially. By 2050, approximately 938 million people, representing 9.8% of the world population, will be highly myopic.

The complications extend beyond refractive errors:

• Myopic macular degeneration: The most important complication that causes visual impairment, especially in high myopia cases, with characteristics including lacquer cracks, Fuchs spot, and chorioretinal atrophy
• Retinal detachment: The most sight-threatening peripheral retinal lesion that occurs when the thinned retina tears or separates from its position
• Glaucoma: Increased fluid pressure within the eyeball that progresses silently, often without symptoms until vision constricts
• Cataracts: The most common complication of high myopia that occurs earlier in myopic individuals than in the general population

Risk levels scale dramatically with myopia severity. Studies show odds ratios of 13.57 for low myopia, 72.74 for moderate myopia, and 845.08 for high myopia regarding visual impairment. The cumulative risk of visual impairment or blindness increases from 6.9% in eyes shorter than 24mm to 90.6% in eyes of 30mm or greater for participants aged 75 years or older. Keep in mind that these complications persist even after refractive surgery and represent chronic issues from pathological changes within the aging myopic eyeball.

How Myopia Control Contact Lenses Work

The peripheral defocus principle

Standard single vision glasses and contact lenses focus light sharply on the central retina for clear vision. Peripheral light rays, however, end up focusing behind the retina. Researchers call this hyperopic defocus. This positioning sends a "grow faster" signal to your child's eye.

Animal studies on young chicks and infant monkeys showed that peripheral defocus can either accelerate or slow axial elongation, even when central vision remains clear. Light focusing in front of the retina, termed myopic defocus, slows eye growth. Light focusing behind the retina acts as a growth stimulus.

Myopia control contacts exploit this biological response by creating myopic defocus in the peripheral retina while maintaining clear central vision. The peripheral light rays focus in front of the retina and generate a "slow down" signal for eye growth. Slowing eye growth slows myopia progression.

Center distance vs peripheral power design

Center-distance multifocal contact lenses place distance correction at the lens center and near vision correction in the outer peripheral areas. These lenses were designed for adults over 40-45 with presbyopia. They happened to move peripheral light rays in front of the retina. Research confirmed this design slows myopia progression in children.

Purpose-built myopia control lenses like MiSight use ActivControl Technology with alternating vision and correction zones in concentric rings. Two correction zones provide clear vision correction. Two treatment zones create myopic defocus by focusing images at the front of the retina. This signals the eye to slow its lengthening rate.

The average myopic defocus along the line of sight from center-distance multifocal designs ranges from -0.73 diopters to -0.89 diopters. This central myopic defocus occurs while maintaining good high-contrast visual acuity.

Center-near multifocal designs, with plus power at the lens center, fail for myopia control. The over-refraction required for acceptable distance vision eliminates any potential myopic defocus created by the central add power. These designs cause more hyperopic defocus with increased eccentricity. This makes them unsuitable based on the myopic defocus hypothesis.

Why contact lenses outperform regular glasses

Contact lenses sit on your child's eye surface and move with the eye. This positioning creates a natural advantage over spectacles in generating the desired peripheral focus profile. Peripheral defocus contact lenses show superiority to peripheral defocus ophthalmic lenses.

Spectacles remain stationary on the face. The optical zones shift relative to their line of sight when your child looks in different directions. Contact lenses eliminate this problem by maintaining consistent optical alignment whatever the gaze direction.

MiSight lenses use peripheral defocus in two correction zones to address myopia in all gaze positions. This makes them much easier to use than progressive eyeglass lenses for most wearers. Studies comparing peripheral refraction found that while some research identified myopic defocus during soft contact lens wear, most spectacle corrections produced hyperopic defocus whether undercorrected, on-refraction, or overcorrected.

Types of Multifocal Contact Lenses for Myopia Control

Multifocal contact lenses designed for myopia control use different optical approaches to help manage myopia progression, particularly in children and teenagers. These lenses can be broadly categorized by their optical design and add power.

Soft Multifocal Contact Lenses

Soft multifocal contact lenses for myopia control generally use three main optical designs:

• Concentric ring designs use alternating zones with different optical powers. These designs create a combination of correction for clear vision and myopic defocus to help manage eye growth.
• Progressive designs gradually change optical power across the lens rather than using clearly defined zones.
• Extended Depth of Focus (EDOF) designs use controlled spherical aberration to extend the range of clear vision without relying on separate power zones.

Research suggests that concentric ring designs may provide stronger control of axial elongation than some progressive designs. Soft multifocal lenses can also offer greater flexibility than orthokeratology for certain prescriptions because some lens designs can accommodate higher levels of myopia and astigmatism.

Many myopia control multifocal lenses are available primarily in spherical prescriptions, while some designs are also available in toric parameters for people who need astigmatism correction.

High-Add vs. Medium-Add Power Lenses

The amount of additional near power, or add power, is another important factor in multifocal contact lens design. Research comparing different add powers has found differences in their ability to slow myopia progression.

In one three-year study, children wearing high-add multifocal lenses with a +2.50 diopter add experienced an average myopia progression of approximately -0.60D. The medium-add group using a +1.50D add progressed by about -0.89D, while the single-vision contact lens group progressed by approximately -1.05D.

Compared with single-vision lenses, the difference in myopia progression was:

• 0.46D for high-add lenses
• 0.30D for high-add versus medium-add lenses
• 0.16D for medium-add versus single-vision lenses

Measurements of axial eye growth showed approximately 0.42 mm of growth in the high-add group, compared with 0.58 mm in the medium-add group and 0.66 mm in the single-vision group.

Overall, the high-add design was associated with approximately 43% slower myopia progression and 36% slower axial eye growth compared with single-vision correction in that study.

The findings suggest that higher add powers may provide greater myopia-control effects in some children. However, lens selection should be based on an eye-care professional's assessment rather than add power alone.

FDA-Approved Myopia Control Contact Lenses

The first contact lens specifically approved by the U.S. Food and Drug Administration (FDA) for myopia control in children was a daily disposable multifocal lens.

Its FDA indication covers children who begin treatment between 8 and 12 years of age, with prescriptions ranging from -0.75D to -4.00D spherical equivalent and no more than 0.75D of astigmatism.

Clinical research found that the lens reduced myopia progression by approximately 59% based on cycloplegic spherical equivalent and 52% based on axial elongation compared with single-vision correction.

Other multifocal contact lens designs may sometimes be used off-label for myopia management. Because FDA clearance or approval varies by product and indication, patients and parents should check the specific labeling and discuss appropriate options with an eye-care professional.

Daily Disposable vs. Monthly Replacement Lenses

Replacement schedule is another consideration when choosing multifocal contact lenses for myopia management.

Daily disposable lenses are designed to be worn once and discarded after use. They do not require routine cleaning or overnight storage, which can simplify lens care and reduce the need for contact lens solution.

Research has also associated daily disposable wear with a substantially lower risk of inflammatory complications compared with some longer replacement schedules. One study reported a 12.5-fold lower risk of inflammatory events among daily disposable lens wearers compared with other replacement schedules.

Most newer myopia-control contact lenses use daily disposable designs, although some monthly replacement multifocal lenses are also available and may be prescribed off-label in certain situations.

Ultimately, the choice between daily and monthly lenses depends on the wearer's prescription, age, eye health, lifestyle, ability to follow lens-care instructions, and the recommendations of an eye-care professional.

Research-Backed Results From Clinical Studies

The BLINK study findings

The Bifocal Lenses In Nearsighted Kids (BLINK) study recruited 294 children ages 7-11 with less than 5D of myopia and analyzed three groups over three years. This National Eye Institute-sponsored, double-masked, randomized clinical trial compared high-add power (+2.50D), medium-add power (+1.50D), and single vision soft contact lenses.

Results showed distinct differences between groups. Children wearing high-add multifocal contacts progressed by -0.56D over three years. The medium-add group progressed by -0.85D and the control group by -1.01D. This represented a meaningful treatment effect, with the control group progressing -0.45D more than the high-add treatment group.

Axial length measurements confirmed these findings. The control group experienced 0.62mm of eye growth, compared to 0.55mm for medium-add wearers and 0.39mm for high-add lens users. The high-add group showed 0.23mm less axial elongation than controls over the three-year period.

Long-term benefits after stopping treatment

Extended research on MiSight daily disposable soft multifocals showed sustained effectiveness. One six-year study showed a 59% reduction in myopia progression over the first three years, with the effect maintaining at 52% by the sixth year.

Concerns about rebound effects appear valid. One study that analyzed cessation of orthokeratology lens wear showed this may lead to a subsequent increased rate of axial elongation. But systematic reviews suggest treatment effects in both contact lens and ortho-k approaches may reduce over time naturally.

Effectiveness rates compared to single vision lenses

Randomized controlled trials show that multifocal contacts for myopia control and myopia management lenses slow dioptric progression with efficacy ranging from 40% to 60% reduction in spherical equivalent refractive error over 1-3 years compared to controls. These studies also report axial elongation reduction ranging from 30% to over 50% during the same period.

Standard single vision soft or rigid gas permeable lenses proved ineffective at slowing myopia progression or axial elongation in randomized controlled trials. MiSight contact lenses achieved 66% reduction in refraction and 28mm reduction in axial length.

Starting treatment at younger ages

Your child benefits more from myopia control at younger ages because myopia progresses faster in younger eyes. Myopia progression peaks in children aged 7-10 years, then slows down each year after that. Earlier starts provide the best chance to slow progression.

Soft lenses work successfully as young as age six or seven. The effect of starting myopia management at an early age matters greatly, as younger children show more meaningful treatment effects.

Safety and Benefits for Kids and Teens

Contact lens safety in young wearers

Research reveals a counterintuitive finding about contact lens safety: children aged 8-12 prove safer wearers than teenagers or adults. Daily disposable lenses carry an infection risk of only 1 case per 5,000 wearers each year. Monthly replacement lenses show higher risk at about 1 case per 1,000 wearers per year.

A six-year study tracked 8-12 year olds wearing daily disposable soft contact lenses. The results showed no cases of serious eye infections and no changes to eye health. Microbial keratitis affects between 2 and 4 per 10,000 patient years for daily-wear patients, with around 5% resulting in vision loss.

Quality of life improvements

Multifocal contacts for myopia control boost your child's daily experience and slow myopia progression. The ACHIEVE study found perceptions of physical appearance and athletic competence increased among contact lens wearers compared to spectacle wearers. Children switching from glasses to soft bifocal contact lenses reported improvements in satisfaction and activities after just one month.

Managing risks of eye infection

Proper hygiene minimizes infection risks. Wash hands really well before handling lenses. Never expose contacts to water and replace lenses as prescribed. Daily disposables eliminate cleaning requirements, which reduces two risk factors for microbial keratitis.

When children can start wearing contacts

Most eye doctors think ages 10-12 are optimal to begin contact lens wear. But maturity and responsibility matter more than age. Children as young as 8 years can wear myopia control contacts safely if they demonstrate good hygiene habits and follow instructions.

Conclusion

Myopia control contacts represent your best defense against childhood myopia progression. These lenses slow progression by 40-60% compared to regular glasses and offer protection against future complications like retinal detachment and macular degeneration. High-add multifocal designs deliver research-backed results, especially when you have FDA-approved options like MiSight with proven safety profiles for children as young as eight years old.

Your child's eyes need more than just vision correction. Treatment must address the root problem of excessive eye growth. Myopia control contacts accomplish both goals, delivering clear vision today and protecting eye health for tomorrow. Consult with your eye doctor to determine if your child is a candidate for these lenses.

FAQs

Q1. At what age can children safely start wearing contact lenses for myopia control? Children can safely begin wearing myopia control contact lenses as young as 8 years old, though ages 10-12 are often considered optimal. The key factor is maturity and responsibility rather than age alone. If a child demonstrates good hygiene habits and can consistently follow instructions for lens care, they may be ready for contact lenses. Research shows that children aged 8-12 are actually safer contact lens wearers than teenagers or adults.

Q2. How effective are contact lenses at slowing down myopia progression compared to regular glasses? Myopia control contact lenses are significantly more effective than regular glasses at slowing myopia progression. These specialized multifocal lenses can reduce myopia progression by 40-60% and slow eye growth by 30-50% over 1-3 years. High-add power lenses (+2.50D) show the best results, slowing progression by 59% and eye growth by 52%. Regular prescription glasses only correct blurry vision but do nothing to address the underlying problem of excessive eye growth.

Q3. Are contact lenses safe for teenagers to wear? Yes, contact lenses are safe for teenagers when proper hygiene practices are followed. Daily disposable lenses carry a very low infection risk of only 1 case per 5,000 wearers annually. Studies show that younger wearers, including teens, actually have fewer complications than adults. The key to safety is washing hands thoroughly before handling lenses, never exposing contacts to water, and replacing lenses as prescribed.

Q4. Why do eye doctors recommend starting myopia control treatment at younger ages? Eye doctors recommend starting myopia control treatment early because myopia progresses fastest in younger children, particularly those aged 7-10 years. The progression rate naturally slows down with each passing year. Starting treatment earlier provides the best opportunity to slow progression and prevent high myopia, which carries serious risks for sight-threatening complications later in life. Children who begin treatment at younger ages show more significant treatment effects.

Q5. What are the long-term benefits of using myopia control contact lenses? Myopia control contact lenses provide protection against future eye health complications associated with high myopia, including retinal detachment, macular degeneration, glaucoma, and early cataracts. Studies show that treatment effects are sustained over time, with one six-year study demonstrating 52-59% reduction in myopia progression. Beyond health benefits, these lenses also improve children's quality of life, enhancing their perceptions of physical appearance, athletic competence, and social acceptance compared to wearing glasses.