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Published on: February 18, 2022
Influence of intraocular pressure on retinal vascular caliber measurements in children
Kristin de Haseth1, Ning Cheung, Seang Mei Saw
1Centre for Eye Research Australia, University of Melbourne, Melbourne, Victoria, Australia.
Insights
Intraocular pressure (IOP) does not appear to affect retinal vascular caliber in young children. This study found no significant link between IOP measurements and the diameter of retinal blood vessels in healthy youth.
Area of Science:
- Ophthalmology
- Pediatric Ophthalmology
- Vascular Physiology
Background:
- Retinal vascular caliber is a key indicator of ocular and systemic health.
- Understanding the physiological determinants of retinal vascular caliber in children is crucial for early detection of potential health issues.
Purpose of the Study:
- To investigate the relationship between intraocular pressure (IOP) and retinal vascular caliber in young children.
- To clarify the role of IOP as a potential determinant of retinal vascular dimensions in pediatric populations.
Main Methods:
- A cross-sectional study involving 386 Chinese children aged 7-9 years from the Singapore Cohort Study of the Risk factors for Myopia (SCORM).
- Intraocular pressure (IOP) was measured using noncontact tonometry.
- Retinal vascular calibers (arteriolar and venular) were quantified from retinal photographs via a standardized computer-based analysis.
Main Results:
- After adjusting for multiple confounding factors (age, gender, BMI, corneal thickness, refraction, axial length, birth weight), no statistically significant association was found between IOP levels and retinal arteriolar or venular caliber.
- Mean retinal arteriolar caliber ranged from 153.8 to 155.6 micrometers across IOP quartiles (P=0.45).
- Mean retinal venular caliber ranged from 220.6 to 225.7 micrometers across IOP quartiles (P=0.53).
Conclusions:
- This research found no evidence to support the hypothesis that intraocular pressure influences retinal vascular caliber in healthy young children.
- The findings suggest that IOP is not a significant determinant of retinal vascular dimensions in this pediatric cohort.
Purpose:
To determine whether intraocular pressure (IOP) influences retinal vascular caliber in young children, in order to provide a better understanding of its physiological determinants.
Design:
Cross-sectional study.
Methods:
Three hundred and eighty-six Chinese children seven to nine years of age participated in the Singapore Cohort Study of the Risk factors for Myopia (SCORM). IOP was measured by noncontact tonometry. Retinal vascular calibers were measured from retinal photographs using a computer-based program following standardized protocols.
Results:
After adjusting for age, gender, body mass index, corneal thickness, spherical equivalent refraction, axial length, and birth weight, mean retinal arteriolar and venular caliber were similar across the distribution of IOP (arteriolar caliber of 155.2 microm, 155.6 microm, 153.8 microm, 154.2 microm, P value for trends, 0.45; and venular caliber of 225.7 microm, 220.6 microm, 224.5 microm, 222.7 microm, P value for trends, 0.53; comparing increasing quartiles of IOP).
Conclusions:
Our study provides no evidence that IOP influences retinal vascular caliber in healthy young children.
