Related Experiment Video

Updated: Jun 6, 2025

Author Spotlight: An Automated Method for Assessing Visual Acuity in Infants and Toddlers Using an Eye-Tracking System
05:10

Author Spotlight: An Automated Method for Assessing Visual Acuity in Infants and Toddlers Using an Eye-Tracking System

Published on: March 17, 2023

2.6K

The Prevalence and Risk Factors of Abnormal Vision Among Preschool Children

Dan Liu1, Li Zhang1, Mengna Shou1

  • 1Shaoxing Maternity and Child Health Care Hospital, Shaoxing University, Shaoxing, Zhejiang, People's Republic of China.

Pediatric Health, Medicine and Therapeutics
|November 25, 2024
PubMed

Insights

Abnormal vision affects 14.4% of preschool children. Excessive screen time and early electronic device exposure are key risk factors, while good family lighting and diet are protective.

Area of Science:

  • Ophthalmology
  • Pediatrics
  • Public Health

Background:

  • Abnormal vision in early childhood significantly impacts visual, motor, and cognitive development.
  • Untreated vision problems can lead to long-term adverse psychosocial outcomes.
  • Early identification and intervention are crucial for optimal child development.

Purpose of the Study:

  • To determine the prevalence of abnormal vision in preschool children aged 4-6 years in Shaoxing, China.
  • To identify associated risk factors contributing to abnormal vision in this age group.
  • To explore protective factors that may mitigate the risk of abnormal vision.

Main Methods:

  • A cross-sectional study was conducted with 9913 preschool children (aged 4-6) in Shaoxing, China.
  • Data was collected through structured questionnaires administered to parents, covering sociodemographic and relevant factors.
  • Logistic regression analysis was employed to identify risk and protective factors.

Main Results:

  • 14.4% of preschool children exhibited abnormal vision.
  • Watching TV for over 3 hours daily, close viewing distances, and early electronic device exposure (before age 2) significantly increased abnormal vision risk.
  • Parental awareness of chewing's impact on eye development, good family lighting, balanced diet, and parental refractive error were associated with abnormal vision.

Conclusions:

  • Exposure to electronic products and family environment significantly influence abnormal vision in young children.
  • Genetic predisposition also plays a role in vision development.
  • Regular ocular screenings and early interventions are recommended for preventing abnormal vision in preschool children.
Abstract

Keywords:
Chinaabnormal visionpreschool childrenrisk factors

More Related Videos

Subjective Refraction Test Using a Smartphone for Vision Screening05:36

Subjective Refraction Test Using a Smartphone for Vision Screening

Published on: October 18, 2024

609
Using an Automated Hirschberg Test App to Evaluate Ocular Alignment05:40

Using an Automated Hirschberg Test App to Evaluate Ocular Alignment

Published on: March 24, 2020

11.5K

Related Concept Videos

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,...
5.7K
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...
2.5K
Accessory Structures of the Eye01:17

Accessory Structures of the Eye

Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
1.5K
Attention-Deficit/Hyperactivity Disorder01:30

Attention-Deficit/Hyperactivity Disorder

Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by persistent inattention, hyperactivity, and impulsivity. It affects approximately 5-8% of children globally, with around 60-70% of cases persisting into adulthood. ADHD has significant implications for educational attainment, social interactions, and occupational success.
Diagnostic Criteria and Symptoms
To diagnose ADHD, symptoms must manifest before age 12 and be evident across multiple settings....
42