Current Status of Glaucoma-related Data Management and Efforts toward Data Standardization

Area of Science:

• Ophthalmology
• Optometry
• Ocular Biomechanics

Background:

• Physiologic excyclotorsion is an inward rotation of the eye.
• Understanding normative values is crucial for diagnosing ocular conditions.
• Aging effects on ocular torsion are not fully understood.

Purpose of the Study:

• Determine normative values for the physiologic excyclotorsion angle using fundus photography.
• Investigate the influence of aging on this angle in adults.

Main Methods:

• Analysis of fundus photographs from 45 and 65-year-old subjects without ocular diseases.
• Measurement of the angle between the horizontal line and the line connecting the fovea and optic disc center.
• Statistical comparison of torsion angles between age groups and between eyes.

Main Results:

• No significant difference in physiologic excyclotorsion angle was found between 45 and 65-year-old subjects.
• The average excyclotorsion angle was 6.2±2.9/6.8±2.8 degrees (right eye) and 7.1±3.6/7.8±3.2 degrees (left eye) for the 45/65-year-old groups, respectively.
• The left eye exhibited a statistically larger excyclotorsion angle compared to the right eye across both age groups.

Conclusions:

• Age does not appear to significantly alter the physiologic excyclotorsion angle in adults aged 45-65.
• Fundus photography provides a reliable method for assessing ocular torsion.
• A larger physiologic excyclotorsion angle in the left eye is a common finding.