Myopia (Short-Sightedness): Causes, Treatment & Long-Term Correction in India

What Is Myopia and Why Is It Rising in India?

Myopia (short-sightedness) is when the eyeball is slightly too long, causing distant objects to appear blurry while near vision remains clear. Childhood myopia has risen significantly in India in recent decades, linked to:

• Excessive near work — phones, tablets, online classes (especially post-2020)
• Reduced outdoor time — natural sunlight protects against myopia progression
• Genetic predisposition — myopic parents = higher child risk
• Urban lifestyle — apartment living, less open horizons for the eye

Myopia Symptoms in Children and Adults

Watch for these signs:

In children: - Squinting to see the blackboard - Sitting too close to TV or holding screens close - Frequent headaches - Dropping grades despite effort - Rubbing eyes excessively

In adults: - Blurred road signs while driving - Need to remove glasses to read or use phone - Eye strain after computer work - Frequent prescription changes

Myopia Control in Children (Ages 6-18)

Slowing childhood myopia is now possible with evidence-based treatments:

• Atropine 0.01% eye drops: One drop nightly; studies show it can slow progression in many children. Widely studied and used in India under specialist supervision.
• Orthokeratology (Ortho-K) lenses: Special contacts worn overnight reshape the cornea; child sees clearly without glasses during the day. Studies show it can slow progression.
• Multifocal soft contact lenses (MiSight): Daytime contacts approved for myopia control in kids 8+.
• Outdoor time: Around 2 hours daily of outdoor activity is linked to slower myopia onset and progression.
• 20-20-20 rule: Every 20 minutes of screen time, look at something 20 feet away for 20 seconds.

A paediatric optometrist can recommend the right combination.

Long-Term Correction for Adult Myopia

For adults with stable prescriptions, several procedures can correct myopia long-term:

• LASIK (Femto, Contoura): For myopia up to -10.0 D. Commonly chosen — around 24-hour functional recovery, ₹50K-₹1.9L for both eyes.
• ReLEx SMILE: For myopia up to -10.0 D, often suited to active lifestyles. ₹1.7L-₹2.2L for both eyes.
• PRK / Surface Ablation: For thinner corneas or contact-sport athletes. Slightly slower recovery (5-7 days).
• ICL (Implantable Collamer Lens): For high myopia (-8 to -25 D) or thin corneas. A soft lens is placed inside the eye. ₹2L-₹3.5L for both eyes.

A detailed eye evaluation determines which option suits your eyes.

High Myopia: Special Considerations

If your prescription is above -6.0 D, you have 'high myopia' — and lifelong eye care is essential:

• Annual dilated retinal examinations (higher risk of retinal tears, detachment)
• Regular OCT scans to monitor macular health
• Awareness of warning signs: sudden floaters, flashes of light, curtain-like shadow
• Avoid contact sports without protective eyewear

LASIK or SMILE corrects the optical error but doesn't reduce these structural risks — high myopes need ongoing eye care for life.

Can LASIK Treat Minus Power?

Yes — minus power (myopia) is the most common thing LASIK treats. The laser removes a precise amount of tissue from the centre of the cornea, flattening it so that light focuses on the retina instead of in front of it. Contoura Vision, SMILE and PRK correct minus power on the same principle, using different ways of reaching the tissue.

The amount of tissue removed rises with the power. That is why your corneal thickness, not just your prescription, decides how much minus power can be safely treated. For a typical healthy cornea, LASIK and SMILE handle low to moderate minus power comfortably, and higher power up to about -10.0 D if the cornea is thick enough.

Before treatment, your surgeon will also confirm that the power has stopped increasing. Minus power that is still rising in your early twenties will come back after surgery, because the eye itself is still lengthening.

Can LASIK Cure High Myopia?

LASIK can correct high myopia within limits, but 'cure' needs explaining. LASIK removes the focusing error so you see clearly without glasses — it does not change the length of the eyeball, which is the underlying cause of myopia.

What this means by power range:

• Up to about -6.0 D: Usually straightforward for LASIK, SMILE or Contoura Vision if the cornea is healthy.
• About -6.0 to -10.0 D: Often treatable with laser if the cornea is thick enough. Night halos and glare are a little more likely, and a small enhancement is occasionally needed.
• Beyond about -10.0 D, or a thin cornea at any high power: ICL is generally preferred, because a laser would remove too much corneal tissue. ICL adds a lens inside the eye instead.
• Over about 45–50 with high myopia: Lens exchange may be considered, but very short-sighted eyes carry a higher risk of retinal detachment after lens surgery, so careful retinal assessment is essential.

Whichever option you choose, the high-myopia retinal risks described above remain. Laser or ICL makes you independent of glasses; it does not replace annual dilated retinal check-ups.

Will My Minus Power Come Back After LASIK?

In most adults with a stable prescription, the correction is long-lasting. A small amount of power can return in some people over the years, usually because:

• The eye was still changing at the time of surgery
• The original power was high, where slight regression is more common
• Very heavy near work continued to push mild progression in the twenties
• Age-related lens changes, including early cataract, shift the power later in life

If power does return, an enhancement may be possible if there is enough corneal thickness left. Separately, everyone develops presbyopia from around 40, so reading glasses may still be needed later even when distance vision stays sharp.