What is childhood myopia and why is it dangerous?
Myopia (nearsightedness) is not just an inconvenience. It is a progressive condition in which the eye grows faster than normal, creating lifelong vision risks.
How myopia develops
In normal vision, light focuses exactly on the retina. In myopia, the eyeball becomes too long, and the focus shifts in front of the retina. As a result, distant objects appear blurry.
In children, the eye continues to grow until 18-20 years of age. If this growth occurs too quickly, myopia progresses — each additional millimeter in eye length adds approximately 3 diopters.
Without control, myopia can progress at a rate of -0.5 to -1.0 D per year, turning a mild degree into a severe one in just a few years.
Normal vision
Myopia (nearsightedness)
Cornea
Retina
Cornea
Retina
Lens
Focus
Cornea
Retina
Cornea
Retina
Lens
Focus
Normal eye (left) vs myopic eye (right)
Degrees of myopia
The higher the degree, the greater the risks to eye health
Mild
up to -3.0 D
Initial stage. Minimal risks with proper control.
Moderate
-3.0 to -6.0 D
Increased risks. Requires regular monitoring and control.
High
over -6.0 D
Serious risk of complications: retinal detachment, glaucoma, cataracts.
Two paths of myopia development
Early intervention radically changes the prognosis. Compare two scenarios: without control and with control.
TOP PATH
Without control
BOTTOM PATH
With control
–1D
–4D
–7D
–10D
–12D
–1D
–2D
–3D
–3.5D
–4D
Without control
-1 D at age 7 → -12 D at age 18. High risk of lifelong complications.
With control
-1 D at age 7 → -4 D at age 18. Significantly lower risk of serious complications.
Complications of high myopia
A high degree of myopia (over -6 D) significantly increases the risk of serious eye diseases
Retinal detachment
Risk increases 5-fold. Can lead to irreversible vision loss.
Glaucoma
Increased intraocular pressure damages the optic nerve.
Cataracts
Lens clouding develops earlier and more rapidly in high myopia.
Maculopathy
Damage to the central retinal area — the leading cause of irreversible blindness in young people.
Source: Flitcroft DI. The complex interactions of retinal, optical and environmental factors in myopia aetiology. Prog Retin Eye Res. 2012
Don't delay the vision check-up
Early detection of myopia is the key to effective control. The sooner you start, the better the prognosis.