Spectrally resolved autofluorescence imaging in posterior uveitis

Area of Science:

• Ophthalmology
• Medical Imaging
• Retinal Diseases

Background:

• Clinical diagnosis of posterior uveitis subtypes presents significant challenges.
• Current diagnostic methods may not fully differentiate between various posterior uveitis entities.

Purpose of the Study:

• To investigate the utility of green (GEFC) and red emission fluorescent components (REFC) in differentiating posterior uveitis entities.
• To establish a novel imaging biomarker for improved diagnostic accuracy.

Main Methods:

• Cross-sectional study involving 76 eyes from 45 patients with posterior uveitis.
• Utilized color fundus photography, spectrally resolved fundus autofluorescence (Color-FAF), and optical coherence tomography.
• Quantified GEFC and REFC intensities of retinal/choroidal lesions and analyzed GEFC/REFC ratios.

Main Results:

• Significant differences in mean GEFC/REFC ratios were observed across birdshot chorioretinopathy, ocular sarcoidosis, APMPPE, and PIC (p < 0.0001).
• Non-pigmented lesions and macular neovascularizations showed predominantly GEFC, while pigmented lesions showed predominantly REFC.
• Color-FAF imaging demonstrated involvement of both short- and long-wavelength fluorophores in posterior uveitis.

Conclusions:

• The GEFC/REFC ratio serves as a significant imaging biomarker for distinguishing between posterior uveitis entities.
• This novel approach can aid in the clinical diagnosis and differentiation of challenging posterior uveitis cases.