Angle recess area decreases with age in normal Japanese

Area of Science:

• Ophthalmology
• Anatomy
• Biometry

Background:

• Anterior chamber angle configuration is crucial for ocular health.
• Understanding its relationship with biometric factors is important for predicting eye conditions.

Purpose of the Study:

• To prospectively investigate the associations between anterior chamber angle configuration and refractive error, axial length, age, and body height in a Japanese population.
• To analyze the correlation between angle recess area (ARA) and various ocular and anthropometric parameters.

Main Methods:

• Prospective study of 65 Japanese subjects (65 eyes).
• Comprehensive eye examination including A-scan biometry and ultrasound biomicroscopy.
• Measurement of angle recess area (ARA) using custom software.

Main Results:

• ARA decreased with age across all quadrants, with the superior quadrant being significantly narrower in older individuals.
• ARA showed positive correlations with anterior chamber depth, axial length, and body height.
• ARA demonstrated inverse correlations with age and refractive error.
• Multivariate analysis confirmed significant associations between ARA and anterior chamber depth, axial length, and younger age.

Conclusions:

• Anterior chamber area narrows with age, particularly in the superior quadrant, in the Japanese population.
• Narrower angles are associated with older age, shorter axial length, and shallower anterior chamber depth.
• The study hypothesizes a potential future decrease in angle-closure glaucoma in Japan due to increasing axial myopia in younger individuals.