Ocular signs predictive of tubercular uveitis

Area of Science:

• Ophthalmology
• Infectious Diseases
• Immunology

Background:

• Uveitis is a significant cause of vision loss.
• Tuberculosis (TB) is an important, often overlooked, cause of uveitis, particularly in endemic areas.
• Distinguishing tubercular uveitis from other causes is crucial for appropriate management.

Purpose of the Study:

• To identify specific ocular signs that predict tubercular uveitis.
• To differentiate clinical features between tubercular and non-tubercular uveitis.

Main Methods:

• A retrospective, comparative case study involving 386 patients with active uveitis.
• Patients were categorized into presumed tubercular uveitis (n=182) and non-tubercular uveitis (n=204) groups.
• Ocular signs including keratic precipitates, posterior synechiae, iris nodules, snowballs, snow banking, vasculitis, choroiditis, and other posterior uveitis types were analyzed.

Main Results:

• Broad-based posterior synechiae, retinal vasculitis (with or without choroiditis), and serpiginous-like choroiditis were significantly more prevalent in the tubercular uveitis group.
• Filiform posterior synechiae were more common in the non-tubercular uveitis group.

Conclusions:

• In tuberculosis-endemic regions, the presence of broad-based posterior synechiae, retinal vasculitis, and serpiginous-like choroiditis in patients with latent or active tuberculosis suggests a tubercular etiology for uveitis.
• These clinical findings warrant specific antitubercular treatment.