The influence of low birth weight on the prevalence of refractive errors among schoolchildren

Damian Czepita1, Maria Zejmo, Artur Mojsa

  • 1Department of Ophthalmology, Pomeranian Medical University al. Powstańców Wlkp. 72, 70-111 Szczecin.

Insights

Low birth weight may influence refractive errors in schoolchildren. Children born weighing over 2500 grams showed higher rates of hyperopia and lower rates of anisometropia.

Area of Science:

  • Ophthalmology
  • Pediatric Ophthalmology
  • Public Health

Background:

  • Refractive errors are common vision impairments in children.
  • Birth weight is a potential factor influencing early development, including ocular health.

Purpose of the Study:

  • To investigate the association between low birth weight and the prevalence of refractive errors in a large cohort of schoolchildren.
  • To determine if birth weight impacts the occurrence of myopia, hyperopia, and anisometropia.

Main Methods:

  • A cross-sectional study involving 3663 schoolchildren aged 6-17 years.
  • Refractive errors assessed via skiascopy with cycloplegia, reported as spherical equivalent (SE).
  • Birth weight data collected via parental questionnaire; statistical analysis using chi-square test.

Main Results:

  • Hyperopia was more prevalent in children aged 6-7 years with birth weights > 2500 grams (p < 0.05).
  • Anisometropia was less frequent in children aged 10-11 years with birth weights > 2500 grams (p < 0.05).

Conclusions:

  • Low birth weight may be associated with the prevalence of refractive errors in schoolchildren.
  • Findings suggest a potential link between birth weight and specific refractive error types, warranting further investigation.
Abstract

Related Concept Videos

Focusing of Light in the Eye01:16

Focusing of Light in the Eye

Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
Regression Toward the Mean01:52

Regression Toward the Mean

Regression toward the mean (“RTM”) is a phenomenon in which extremely high or low values—for example, and individual’s blood pressure at a particular moment—appear closer to a group’s average upon remeasuring. Although this statistical peculiarity is the result of random error and chance, it has been problematic across various medical, scientific, financial and psychological applications. In particular, RTM, if not taken into account, can interfere when researchers try to extrapolate results...
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...
Environmental Influences on Intelligence01:29

Environmental Influences on Intelligence

Despite the strong genetic influence on traits like intelligence, environmental factors significantly shape outcomes. For example, while over 90% of height variation is due to genetic differences, environmental factors such as nutrition also have a notable impact. Similarly, for intelligence, changes in a child's surroundings can significantly alter their IQ. Research shows that enriched environments boost children's academic success and help them develop key cognitive skills. Children from...