Eye Power Causes: Why It Increases and How to Control It

Key Takeaways

• Eye power is your refractive error, measured in dioptres. A minus number means myopia; a plus number means hyperopia.
• Why does eye power increase? Family history, long hours of near work, little time outdoors, poor lighting, an out-of-date prescription and, after 40, the ageing lens.
• Habits slow progression. They do not reverse it. No exercise, diet or home remedy lowers a number that is already there.
• For children with progressive myopia, time outdoors and a correct prescription are the foundation. When progression continues, an ophthalmologist may recommend low-dose atropine eye drops, myopia-control spectacle lenses (such as Stellest or MiYOSMART), or a combination of both. These options slow progression; they do not reverse existing myopia.
• Eye power symptoms worth acting on: a prescription that changes at every visit, headaches after near work, squinting, and headlight glare at night.
• Refractive procedures reduce dependence on glasses or contacts, but residual or recurrent refractive error and age-related changes can occur.
• Suitability for any refractive procedure is confirmed after a corneal evaluation, not from a chart or a price list.

Eye power changes over time due to various factors, leading many people to experience worsening vision. Understanding eye power causes is essential in taking preventive measures and maintaining good eye health. Factors such as genetics, lifestyle choices, and prolonged screen exposure contribute to increasing eye power. By identifying the reasons for increasing eye power, individuals can take proactive steps to manage and slow down its progression.

Why Does Eye Power Keep Increasing?

Many individuals wonder, why does eye power keep increasing? The reasons vary based on genetics, habits, and environmental influences. Some of the most common eye power causes include:

Genetic Factors

One of the primary eye power causes is genetics. If both parents have high myopia (nearsightedness) or hyperopia (farsightedness), there is a higher likelihood that their children will develop worsening vision over time.

Excessive Screen Time

Prolonged exposure to digital screens leads to eye strain and fatigue, significantly contributing to eye power increase prevention challenges. Staring at screens for extended periods without breaks can cause eye power causes to worsen, particularly in children and young adults.

Poor Lighting Conditions

Reading or working in dim lighting forces the eyes to work harder, increasing strain and leading to vision deterioration. Proper lighting can help reduce the effects of eye power causes.

Lack of Outdoor Exposure

Natural daylight plays a crucial role in healthy eye development. Insufficient outdoor time has been linked to myopia progression, making it one of the reasons for increasing eye power in children.

Nutritional Deficiencies

A diet lacking essential vitamins like Vitamin A, Omega-3 fatty acids, and antioxidants can affect vision health. Nutritional deficiencies are a significant factor in eye power causes and should be addressed for better eyesight.

Uncorrected Vision Issues

Wearing incorrect prescription glasses or avoiding corrective eyewear can lead to further deterioration, making eye power increase prevention more challenging.

Age-Related Changes

With age, the eye’s lens loses flexibility, leading to presbyopia (difficulty in near vision). This contributes to does eye power increase with age, requiring reading glasses or higher prescription lenses over time.

What Happens If Eye Power Increases?

Eye power, or refractive error, measures how well you can see at different distances. It’s usually measured in diopters (D), and an increase in eye power can indicate a change in your vision.

When eye power increases, light entering the eye doesn’t focus properly on the retina, causing blurry vision. The most common refractive errors that lead to increased eye power are myopia (Nearsightedness), hyperopia (Farsightedness), astigmatism, and presbyopia.

You can also read our comprehensive guide on the various refractive errors of the eye, their causes and management to learn more about these conditions and effective treatment options.

Eye Power Chart: Eye Power Meaning By Range

Eye power or refractive error is written in dioptres, shortened to D. A minus number means the eye focuses light in front of the retina, which is myopia. A plus number means it focuses behind the retina, which is hyperopia.

Range	Classification	What It Means	Typical Correction
-0.25 to -3.00 D	Mild myopia	Distant objects are slightly blurred; near vision is clear	Glasses or contact lenses; often optional for -0.25 to -0.50 D
-3.25 to -6.00 D	Moderate myopia	Distant objects are noticeably blurred without correction	Glasses, contact lenses, or refractive surgery (LASIK, SMILE)
Beyond -6.00 D	High myopia	Significant blur at distance; higher risk of retinal complications	Glasses, contact lenses, ICL, or refractive surgery if cornea permits
+0.25 to +2.00 D	Mild hyperopia	Near objects may be slightly blurred, especially with fatigue	Glasses for reading or close work; often not needed in younger patients
+2.25 to +5.00 D	Moderate hyperopia	Near and sometimes distant objects are blurred	Glasses or contact lenses
Beyond +5.00 D	High hyperopia	Significant blur at near and distance	Glasses, contact lenses, or refractive surgery

A shift of 0.5 D or more between two tests should be discussed with your eye specialist.

Eye Power Symptoms: Signs Your Power Is Increasing

Eye power rarely jumps suddenly. It creeps, and the early symptoms are things people work around without noticing:

• Blur at one specific distance, most often road signs, a number plate or the board at the front of a room
• Squinting, which narrows the light entering the eye and sharpens the image for a moment
• Headaches that arrive after an hour of reading or screen work rather than first thing in the morning
• Eyes that feel heavy or gritty by evening, sometimes watering or burning
• Difficulty driving at night, with headlights spreading into a glare
• Holding a book or phone closer than you used to, or further away if you are past 40
• Rubbing your eyes often, which is one of the commonest signs in children
• A prescription that changes at every visit instead of holding steady

An eye power increase in children usually shows up as behaviour rather than complaints. Sitting very close to the television, moving to the front bench, losing interest in the board, or holding books close to the face are all worth investigating.

If two or three of these apply, an eye check-up is advisable. A refraction takes a few minutes and confirms whether the power has actually changed.

How to Stop Eye Power from Increasing?

While stopping eye power increase completely may not be possible, adopting good habits can help slow its progression. If you’re wondering how to stop eye power from increasing, consider the following steps:

Reduce Screen Time

Following the 20-20-20 rule (looking at something 20 feet away for 20 seconds every 20 minutes) can help prevent digital eye strain, one of the leading eye power causes.

Maintain Proper Posture and Lighting

Sitting at an appropriate distance from screens, maintaining good posture, and ensuring adequate lighting while reading or working can reduce strain on the eyes.

Increase Outdoor Activities

Spending more time outdoors is a proven method for eye power increase prevention in children. Exposure to natural light reduces the risk of worsening vision.

Eat a Nutrient-Rich Diet

Foods rich in Vitamin A (carrots, spinach), Omega-3 (fish, nuts), and antioxidants (berries, green vegetables) support eye health and can slow eye power causes.

Use Corrective Lenses

Wearing the right prescription glasses or contact lenses ensures the eyes do not strain, helping control eye power causes over time.

Regular Eye Checkups

Routine visits to an eye doctor help in early detection and management of eye power causes, ensuring timely intervention.

Medical Treatments for Myopia Control

Lifestyle measures such as outdoor time, screen breaks, and a correct prescription are the foundation of myopia management. However, when eye power continues to increase despite these habits, particularly in children and adolescents, an ophthalmologist may recommend medical interventions that have been studied specifically for slowing myopia progression.

The three most widely used evidence-based options are low-dose atropine eye drops, Essilor Stellest lenses, and Hoya MiYOSMART lenses. Each works through a different mechanism, and suitability depends on the child’s age, prescription, and rate of progression.

Low-Dose Atropine Eye Drops

Atropine is a medication that has been used in ophthalmology for decades. At low concentrations (typically 0.01% to 0.05%), atropine eye drops have been shown to slow myopia progression in children by 30-50% over a treatment period of two to three years.

How it works: The precise mechanism is not fully understood, but atropine is believed to act on receptors in the sclera (the white outer layer of the eye), slowing the elongation of the eyeball that causes myopia to worsen.

Administration: One drop is instilled in each eye at bedtime. The low concentration minimises the pupil dilation and near-vision blur that occur with higher-dose atropine.

Suitability: Children aged approximately 4 to 14 years with progressive myopia, typically defined as an increase of 0.5 dioptres or more per year. Most effective when started early in the progression phase.

Limitations: Does not reverse existing myopia; slows progression only. Not effective in all children. A rebound effect (acceleration of myopia after stopping) can occur, so tapering is recommended. Must be prescribed and monitored by an ophthalmologist.

Aspect	Detail
Concentration	0.01% to 0.05% (low-dose)
Efficacy	Slows progression by 30-50% over 2-3 years (ATOM2, LAMP studies)
Side effects	Mild pupil dilation, slight light sensitivity
Duration	Typically 2-3 years; tapering recommended
Prescription	Required – ophthalmologist only

Essilor Stellest Lenses (H.A.L.T. Technology)

Stellest lenses are spectacle lenses designed by Essilor specifically for myopia management in children. They use H.A.L.T. (Highly Aspherical Lenslet Target) technology, which incorporates 1,021 invisible lenslets across the lens surface.

How it works: The central zone provides clear distance vision. The surrounding lenslets create a volume of signal in front of the retina, which is believed to slow the elongation of the eyeball. This is based on the theory that peripheral defocus plays a role in myopia progression.

Efficacy: In a two-year clinical trial, Stellest lenses slowed myopia progression by an average of 67% compared to standard single-vision lenses.

Suitability: Children with progressing myopia who wear spectacles. The child must wear the lenses for at least 12 hours per day for the myopia-control effect to be clinically meaningful.

Limitations: Effectiveness reduces if worn part-time. Not a cure for existing myopia. Available at select optical outlets. Higher cost than standard lenses.

Hoya MiYOSMART Lenses (D.I.M.S. Technology)

MiYOSMART lenses, developed by Hoya in collaboration with The Hong Kong Polytechnic University, use D.I.M.S. (Defocus Incorporated Multiple Segments) technology.

How it works: The lens has a central optical zone for clear distance vision, surrounded by hundreds of small segments that create myopic defocus. This controlled defocus signal is believed to slow the stimulus for eyeball elongation.

Efficacy: In a two-year clinical study, MiYOSMART lenses slowed myopia progression by approximately 60% and reduced axial elongation by 60%. A six-year follow-up confirmed sustained benefit.

Suitability: Children aged 6 to 18 with progressive myopia. Made from polycarbonate, making them impact-resistant and suitable for active children. Must be worn consistently throughout the day.

Limitations: Not suitable for very high myopia where other interventions may be more appropriate. Must be fitted by a trained optician. Not a cure for existing myopia.

Comparing Myopia Control Options

	Low-Dose Atropine	Stellest (Essilor)	MiYOSMART (Hoya)
Type	Eye drops	Spectacle lens	Spectacle lens
Mechanism	Scleral receptor action slowing axial elongation	Peripheral defocus via 1,021 lenslets (H.A.L.T.)	Peripheral defocus via multiple segments (D.I.M.S.)
Efficacy	30-50% slowing	~67% slowing (2-year trial)	~60% slowing (2-year trial)
Suitable age	~4-14 years	Children with progressive myopia	~6-18 years
Administration	One drop per eye at bedtime	Worn as spectacles (12+ hrs/day)	Worn as spectacles (full day)
Side effects	Mild pupil dilation, light sensitivity	None reported	None reported
Rebound risk	Yes (if stopped abruptly)	Not documented	Not documented
Can be combined	Yes, with spectacle-based options	Yes, with atropine	Yes, with atropine

An ophthalmologist may recommend one option alone or a combination depending on the rate of progression and the child’s age.

Important: These treatments slow progression; they do not reverse myopia that has already developed. The goal is to reduce the final prescription and lower the risk of high-myopia-related complications such as retinal detachment, myopic maculopathy, and glaucoma later in life.

Does Eye Power Increase with Age?

A common question is, does eye power increase with age? The answer depends on different life stages:

• Childhood & Teenage Years: Rapid progression of myopia is common due to excessive screen exposure and close-up work.
• Adulthood: Eye power may stabilize, but prolonged digital work can still cause minor increases.
• After 40: Presbyopia sets in, leading to difficulty in near vision and requiring reading glasses.
• Older Age: Cataracts and other age-related eye conditions can result in fluctuating prescriptions.

Eye Power Increase Prevention

For effective eye power increase prevention, follow these steps:

• Take frequent breaks during screen use.
• Engage in outdoor activities for better natural eye development.
• Consume a diet rich in essential vitamins and nutrients.
• Use protective eyewear to minimize strain from UV and blue light.
• Schedule regular eye exams to detect changes early.

Eye Exercises to Reduce Power

Though eye exercises cannot completely reverse refractive errors, they help reduce strain and improve focus. Some effective eye exercises to reduce power include:

• Palming: Rub palms together and place them over closed eyes to relax eye muscles.
• Focus Shifting: Alternate focus between a near and distant object to improve flexibility.
• Blinking Exercise: Frequent blinking keeps eyes moist and reduces strain.
• Eye Rolling: Slowly roll the eyes in circular motions to relieve tension.
• Near and Far Focusing: Hold a pen close to the eyes and shift focus between the pen and a distant object.

Can Eye Power Be Reduced Naturally?

A common query is, can eye power be reduced naturally? While complete reversal is unlikely, following these practices can slow its progression:

• Maintaining good visual habits to reduce strain.
• Eating a nutrient-rich diet for better eye health.
• Performing eye exercises to reduce power to strengthen eye muscles.
• Limiting screen exposure and using adequate lighting.

How to Reduce Eye Power Naturally at Home?

For those wondering how to reduce eye power naturally at home, eye power cannot be reduced naturally at home. However, some lifestyle changes can help with eye health and general well-being.

• Use herbal eye washes like rose water to refresh eyes.
• Apply cool compresses to reduce eye fatigue.
• Stay hydrated to prevent dryness and irritation.
• Try yoga for eyes, such as candle gazing (Trataka), for focus improvement.
• Practice the 20-20-20 rule, which suggests that every 20 minutes, you should take a 20-second break and look at something 20 feet away to reduce eye strain.

It is imperative to note that while natural tips can help eye health, they are not the one-stop solution to reduce eye power. Consider consulting a specialist to plan the next steps for your eye power and comfort.

What to Do If Your Eye Power Increases?

If you notice that your vision is getting worse or you’re experiencing an increase in eye power, it’s important to take action. Here are some steps you can take to manage or correct your vision:

1. Visit an Eye Care Specialist – Get a comprehensive eye exam to determine the cause and best solution. It is advised to do so every 6 months.
2. Update Glasses or Contacts – A new prescription may be needed for clear and comfortable vision.
3. Consider LASIK Surgery – Tired of glasses? LASIK is an advanced, effective option. Learn more about available types and consult a specialist. Learn about the different types of laser eye surgeries available and consult a specialist for more information.
4. Adopt Healthy Eye Habits – Follow the 20-20-20 rule, maintain good lighting conditions, and keep up a nutrient-rich diet, and incorporate eye exercises into your routine.
5. Get Regular Eye Checkups – Early detection of any issues can help manage eye power changes before they worsen. Annual exams help catch changes early, especially for children as well as people above the age of 40.
6. Manage Health Conditions – If your eye power is increasing due to an underlying health issue, managing that condition is key, alongside your healthcare provider.

Concerned about your eye power? Consult our trusted team of specialists. Schedule Your Eye Checkup

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