Choroidal Thickness and Ametropia in Children: A Longitudinal Study

Area of Science:

• Ophthalmology
• Pediatric eye research
• Choroidal imaging

Background:

• The choroid plays a role in emmetropization.
• Understanding choroidal thickness (ChT) in children is crucial for myopia research.
• Subfoveal ChT, refraction, and axial length relationships require further investigation in pediatric populations.

Purpose of the Study:

• To determine the relationship between subfoveal choroidal thickness (ChT), refraction, and axial length in children.
• To evaluate the longitudinal changes in subfoveal ChT in myopic versus nonmyopic eyes.
• To investigate the predictive value of ChT for myopia progression in children.

Main Methods:

• A cohort of 115 children (229 eyes) aged 2–16 years was studied.
• Measurements included cycloplegic refraction, axial length, and subfoveal ChT at baseline and 15-month follow-up.
• Statistical analysis compared ChT between myopic and nonmyopic groups and evaluated changes over time.

Main Results:

• Subfoveal ChT was significantly thinner in myopic children compared to nonmyopic children (P=0.9999).
• A correlation was observed between subfoveal ChT and axial length.
• Over 15 months, subfoveal ChT increased in nonmyopic eyes but decreased in myopic eyes.

Conclusions:

• Subfoveal choroidal thickness exhibits distinct evolutionary patterns in myopic versus nonmyopic children.
• A thinner choroid may serve as an indicator for the onset or progression of myopia.
• Further longitudinal studies are warranted to validate the role of choroidal thickness in myopia development.