Axial length, a risk factor for retinal vein occlusion: A case control study

Area of Science:

• Ophthalmology
• Retinal Diseases
• Biometry

Background:

• Retinal vein occlusion (RVO) is a significant cause of vision loss.
• The role of ocular biometry, specifically axial length, in RVO pathogenesis requires further investigation.

Purpose of the Study:

• To evaluate the association between axial length and the occurrence of retinal vein occlusion.
• To determine if axial length is a predisposing factor for RVO.

Main Methods:

• A case-control study involving 35 patients with RVO and 35 age-matched controls.
• Axial length of both eyes was measured for all subjects.
• Comparison of axial lengths between affected and unaffected eyes, and between RVO patients and controls.

Main Results:

• Mean axial length was significantly shorter by 0.80mm in central retinal vein occlusion (CRVO) patients compared to controls (p=0.01).
• No statistically significant difference in axial length was found for branch retinal vein occlusion (BRVO) when compared to fellow eyes or controls.
• The study included 70 subjects with a mean age of 37.2 years.

Conclusions:

• Axial length is identified as a local predisposing factor for developing retinal vein occlusion.
• Shorter axial length may increase the risk of central retinal vein occlusion.