Age Spectrum of Meibomian Gland Dysfunction: A Cross-Sectional Study

Area of Science:

• Ophthalmology
• Dry Eye Disease Research
• Meibomian Gland Dysfunction Studies

Background:

• Meibomian gland dysfunction (MGD) is a common cause of evaporative dry eye.
• Clinical manifestations of MGD can vary significantly among individuals.
• Understanding age-related differences in MGD is crucial for accurate diagnosis and management.

Purpose of the Study:

• To investigate and characterize the age-related variations in the clinical presentation of symptomatic meibomian gland dysfunction (MGD).
• To identify specific MGD signs and symptoms associated with different age groups.

Main Methods:

• A cross-sectional study involving 100 symptomatic Asian MGD patients aged 20-89 years.
• Comprehensive clinical assessments including questionnaires, tear film break-up time, corneal staining, and lid margin examination.
• Advanced imaging techniques such as interferometry for lipid layer thickness (LLT) and meibography, alongside blinking pattern analysis.

Main Results:

• Younger MGD patients demonstrated more incomplete blinking, reduced LLT, and increased gland distortion.
• Older patients showed a positive association with increased LLT, meibomian gland plugging, lid margin changes, and gland dropout.
• Multivariate analysis identified younger age and absence of MG plugging as predictors of reduced LLT, while LLT increased monotonically with age.

Conclusions:

• Symptomatic MGD presents differently across age groups, with distinct clinical features in younger versus older individuals.
• The observed increase in LLT with age in MGD is attributed to obstructive and compensatory mechanisms, not improved tear film function.
• A comprehensive diagnostic approach for MGD should integrate patient age, meibomian gland morphology, and clinical context.