Age- and Sex-Based Developmental Biomarkers in Eye Movements.

Area of Science:

• Neuroscience
• Ophthalmology
• Biomarkers

Background:

• Eye movement analysis is vital for assessing brain function and diagnosing neurological disorders.
• Sex differences in neurological conditions are often overlooked, despite their clinical relevance.
• Eye movement metrics offer robust biomarkers for disease classification.

Purpose of the Study:

• To investigate sex-specific differences in eye movement functions.
• To establish normative data for age- and sex-stratified eye movement analysis.
• To enhance the understanding of sex as a factor in neurological assessment.

Main Methods:

• Utilized data from 23,557 subjects across 804 US optometry practices.
• Subjects performed six standardized eye movement tests (smooth pursuit, saccades, fixation stability).
• Statistical analysis included t-tests and linear regression models, stratified by age and sex.

Main Results:

• Identified statistically significant differences in all measured eye movement functions between males and females.
• Confirmed sex-specific patterns in eye movement performance across a wide age range (birth to 80 years).
• Large sample size ensures robust and generalizable findings.

Conclusions:

• Eye movements exhibit significant sex-specific characteristics.
• Normative data are now available for sex- and age-specific comparisons of eye movement function.
• This research enables more precise stratification of individuals by age and sex for clinical and research purposes.