Related Experiment Video
Updated: Jul 19, 2026
A Method to Quantify Visual Information Processing in Children Using Eye Tracking
Published on: July 9, 2016
Palpebral dimensions in Brazilian children: assessment based on digital images
Silvana A Schellini1, Eduarda M Sverzut, Erika Hoyama
1Department of Ophthalmology, Botucatu School of Medicine-UNESP, Botucatu, São Paulo State, Brazil. sartioli@fmb.unesp.br
Insights
Palpebral dimensions in Brazilian children change significantly with age, particularly between 4-5 and 24-36 months. These findings highlight important developmental variations in early childhood ocular measurements.
Area of Science:
- Ophthalmology
- Pediatric Development
- Biometry
Background:
- Understanding normal palpebral development is crucial for diagnosing congenital conditions.
- Establishing normative data for palpebral dimensions in diverse populations is essential.
Purpose of the Study:
- To quantify palpebral dimensions and track their development in Brazilian children.
- To utilize digital imaging for precise measurement of ocular features.
Main Methods:
- An observational study involving 220 children aged 4-72 months.
- Digital frontal images captured in primary ocular position.
- Measurements included eyelid angles, palpebral fissure area, and interpupillary distance.
Main Results:
- All measured palpebral parameters demonstrated an increase with age.
- Outer palpebral angle consistently exceeded the inner palpebral angle.
- Significant developmental changes were observed between 4-5 months and 24-36 months.
Conclusions:
- Palpebral dimensions exhibit notable variations in children under 72 months.
- The period between 24 and 36 months is characterized by particularly significant changes.
- These findings contribute to normative data for pediatric ophthalmology in Brazil.
Purpose:
To determine palpebral dimensions and development in Brazilian children using digital images.
Methods:
An observational study was performed measuring eyelid angles, palpebral fissure area and interpupillary distance in 220 children aged from 4 to 72 months. Digital images were obtained with a Sony Lithium movie camera (Sony DCR-TRV110, Brazil) in frontal view from awake children in primary ocular position; the object of observation was located at pupil height. The images were saved to tape, transferred to a Macintosh G4 (Apple Computer Inc., USA) computer and processed using NIH 1.58 software (NTIS, 5285 Port Royal Rd., Springfield, VA 22161, USA). Data were submitted to statistical analysis.
Results:
All parameters studied increased with age. The outer palpebral angle was greater than the inner, and palpebral fissure and angles showed greater changes between 4 and 5 months old and at around 24 to 36 months.
Conclusion:
There are significant variations in palpebral dimensions in children under 72 months old, especially around 24 to 36 months.
