Is Type 2 Macular Telangiectasia a Bilateral and Symmetrical Disease Entity?

Area of Science:

• Ophthalmology
• Retinal Diseases
• Medical Imaging

Background:

• Type 2 macular telangiectasia (MacTel) is a retinal vascular disorder.
• Understanding inter-eye asymmetry is crucial for accurate disease staging and management.

Purpose of the Study:

• To investigate the prevalence and characteristics of inter-eye asymmetry in type 2 MacTel.
• To analyze the clinical features of MacTel cases exhibiting asymmetrical disease progression.

Main Methods:

• Gass and Blodi classification was used to stage type 2 MacTel cases.
• Multiple imaging techniques, including OCT and OCT angiography, were employed.
• Patients were categorized into symmetrical and asymmetrical disease stage groups.

Main Results:

• Asymmetrical MacTel disease was observed in 40% of 140 patients.
• A two-stage difference between eyes was noted in 46% of asymmetrical cases at presentation.
• A 10% conversion from symmetrical to asymmetrical staging occurred by the final visit.

Conclusions:

• Type 2 MacTel frequently demonstrates inter-eye disease stage asymmetry.
• Unilateral type 2 MacTel disease is a distinct entity requiring specific consideration in staging and further research.