Understanding Astigmatism in Children

When it comes to children's vision issues, myopia often receives more immediate attention than astigmatism. However, symptoms such as blurred vision, frequent eye rubbing, tilting the head to look at things, and losing one's place while reading are often caused by astigmatism rather than just myopia.If astigmatism remains uncorrected for a prolonged period, it not only leads to eye strain and reduced visual acuity but may also trigger amblyopia and strabismus, seriously affecting the development of the child's eyes.

So, what is astigmatism?

To make it easier to understand, let's imagine the eye as a camera.

The surface of a normal cornea resembles a soccer ball, with uniform curvature in all directions; this allows incoming light to be precisely focused onto a single point on the retina, forming a clear image.

In an eye with astigmatism, however, the cornea or lens is shaped more like a rugby ball; the curvature differs between the horizontal and vertical axes. Consequently, when light is refracted, it fails to converge at a single point, instead forming two separate focal lines—one in front of the other—resulting in a permanently blurred image with trailing shadows on the retina.

Astigmatism in children is primarily attributed to factors involving congenital development and adverse acquired factors.

The vast majority of cases of astigmatism in children are congenital and show a strong hereditary tendency; if parents have moderate to high degrees of astigmatism, the likelihood of the child developing the condition increases significantly. This type of congenital astigmatism is relatively stable—it does not suddenly worsen drastically, nor does it resolve on its own.

Acquired factors do not cause astigmatism to appear out of nowhere, but they can aggravate physiological astigmatism, causing it to progress into pathological astigmatism. Common triggers include frequently rubbing or pressing on the eyes, habitually tilting the head or squinting, reading or using a phone while lying down or prone, and excessive near-vision work; improper visual habits can distort the normal shape of the cornea and exacerbate refractive irregularities.

Congenital astigmatism cannot be prevented, but it can be effectively managed through a series of care measures.

① Eliminate poor eye-use habits and protect corneal shape

② Manage the duration of eye use and maintain scientifically sound eye care

③ Optimize the visual environment to reduce strain on the eyes

④ Undergo regular vision screenings for early detection and intervention

In addition to these, lens correction is another effective method.

So, are you familiar with the recommended lenses for children with astigmatism?

We will cover this in our next article.