Quantifying vitreous inflammation in uveitis: an optical coherence tomography prospective study.

Area of Science:

• Ophthalmology
• Medical Imaging
• Inflammatory Diseases

Background:

• Uveitis is a significant cause of vision loss.
• Accurate quantification of intraocular inflammation is crucial for effective management.
• Current grading scales, like Nussenblatt scores, are subjective.

Purpose of the Study:

• To quantify vitreous inflammation in uveitis patients using optical coherence tomography (OCT).
• To correlate OCT findings with established Nussenblatt scores for vitreous haze.
• To assess the reliability of a novel VIT/RPE ratio for inflammation measurement.

Main Methods:

• A prospective cohort study involving 36 eyes from 19 uveitis patients.
• Optical coherence tomography (OCT) scans were analyzed using ImageJ software.
• The vitreous to retinal pigment epithelial layer (VIT/RPE) intensity ratio was calculated and compared to Nussenblatt scores.

Main Results:

• The VIT/RPE intensity ratio demonstrated strong linear correlation with Nussenblatt scores (r values ranging from 0.660 to 0.672, p < 0.001).
• High intragrader (0.999) and intergrader (1.000) reliability was observed for the VIT/RPE ratio measurements.
• The majority of eyes (58.3%) had a Nussenblatt score of 0, indicating mild or no inflammation.

Conclusions:

• The VIT/RPE intensity ratio derived from OCT is a reliable and clinically relevant method for quantifying vitreous inflammation in uveitis.
• This OCT-based metric shows excellent correlation with the gold-standard Nussenblatt scoring system.
• The VIT/RPE ratio offers a promising objective tool for monitoring uveitis activity and treatment response.