Related Experiment Video
Updated: Sep 22, 2025
Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients
Published on: March 29, 2022
Ocular biometry characteristics and its relationship with age, gender, spherical equivalent in Turkish children
1Department of Ophthalmology, Beylikduzu State Hospital, Istanbul, Turkey.
Insights
Ocular biometric parameters like axial length (AL) and spherical equivalent (SE) change with age in Turkish children. Axial length (AL) and anterior chamber depth (ACD) increase with age, while spherical equivalent (SE) decreases, impacting refractive development.
Area of Science:
- Ophthalmology
- Pediatric Ophthalmology
- Refractive Error Research
Background:
- Ocular biometric parameters are crucial for understanding eye growth.
- Studying these parameters in diverse populations aids in comprehending refractive errors.
Purpose of the Study:
- To determine ocular biometry distributions in Turkish children.
- To evaluate associations between ocular biometry, age, gender, and refractive error (spherical equivalent).
Main Methods:
- Prospective study of 344 Turkish children aged 3-14 years.
- Optical biometry measured axial length (AL), anterior chamber depth (ACD), and corneal radius (CR).
- Cycloplegic refraction and linear regression analyzed biometric parameter relationships with age and refraction.
Main Results:
- Preschoolers had the lowest spherical equivalent (SE), AL, ACD, and AL/CR.
- SE decreased with age (weak correlation), while AL and ACD increased (moderate/weak positive correlation).
- AL/CR showed the strongest negative correlation with SE; AL and ACD were higher in boys, CR lower in girls.
Conclusions:
- Axial length (AL) increases with age, and spherical equivalent (SE) decreases, highlighting AL's role in refractive development.
- Ocular biometry in Turkish children shows variations compared to European and Asian populations.
- Findings contribute to understanding refractive error development in pediatric populations.
Background:
Studying ocular biometric parameters in different populations and determining the relationship with personal characteristics can provide valuable information about ocular growth and help provide a better understanding of refractive errors.
Aims:
To describe distributions of ocular biometry and to evaluate its associations with age, gender, spheric equivalent in Turkish children.
Patients And Methods:
In this prospective study 344 children aged 3-14 years were evaluated. Parameters studied included axial length (AL), anterior chamber depth (ACD), and mean corneal radius (CR) measured with optical biometry. Cycloplegic refraction values were obtained using autorefractometer. The change of biometric parameters according to age and gender were evaluated. The relationship between ocular biometry parameters with refraction and age was analyzed by linear regression.
Results:
Mean spherical equivalent (SE), AL, ACD and AL/CR observed to be lowest in the preschooler group (P < 0.001). SE reduced with age, and a weak correlation observed between SE and age (r = -0.333). AL and ACD had moderate and weak positive correlations with age respectively (r = 0.511; r = 0.304). There were negative correlations between SE with AL, ACD and AL/CR (r = -0.826; r = -0.540; r = -0.886). The strongest correlation with SE among these parameters was identified for AL/CR. AL and ACD were higher in boys, while the CR was lower in girls (p < 0.001).
Conclusion:
While AL in children in late schooler group is higher than European countries, it shows similar characteristics in early schooler group. In addition AL is lower in all age groups than Asian population sexcept preschooler group. With age AL increases, SE decreases and AL plays a key role in refractive development.
