Myopia

Recently, myopia has emerged as a major global public health concern. It is estimated that nearly half of the world’s population may become myopic by 2050, highlighting the growing burden of vision-related disorders worldwide.

About Myopia

Myopia, commonly known as nearsightedness, is a vision disorder in which nearby objects appear clear, while distant objects look blurred. It is one of the most common refractive errors affecting people across all age groups.

The condition generally begins during childhood or adolescence and may worsen as the individual grows. In most cases, it stabilizes during adulthood, although some people may experience improvement later in life.

How Does Myopia Occur?

Under normal circumstances, light entering the eye passes through the cornea and is focused by the lens directly onto the retina, enabling clear vision.

In individuals with myopia, however, the eyeball is usually longer than normal from front to back, or the cornea is excessively curved. As a result, incoming light rays are focused in front of the retina rather than on it, causing distant objects to appear blurry.

The greater the elongation of the eyeball, the more severe the degree of nearsightedness.

Causes of Myopia

The exact cause of myopia is not fully understood, but experts believe that it results from a combination of genetic and environmental factors.

Children with a family history of myopia are more likely to develop the condition. Environmental factors such as prolonged screen time, excessive near work, and reduced exposure to outdoor activities and natural sunlight are also considered significant contributors to the rising prevalence of myopia globally.

Symptoms of Myopia

People suffering from myopia commonly experience blurred distance vision, making it difficult to read road signs, classroom boards, or distant objects. Other symptoms include squinting, eye strain, headaches, and visual fatigue, especially after prolonged periods of reading or using digital devices.

In severe cases, myopia can lead to significant visual impairment and may increase the risk of other eye disorders later in life.

Treatment and Management

Myopia can be effectively corrected through glasses or contact lenses, which use negative (minus) powered lenses to shift the focus of light onto the retina.

For adults, several forms of refractive surgery, such as LASIK, can permanently correct nearsightedness by reshaping the cornea. Such procedures are generally not recommended for children, except in rare circumstances.

Preventive measures, including increasing outdoor activities, reducing excessive screen exposure, and ensuring regular eye examinations, are increasingly being promoted to slow the progression of myopia among children.