Aqueous flare in retinitis pigmentosa

Area of Science:

• Ophthalmology
• Retinal Diseases
• Blood-Ocular Barrier Research

Background:

• Retinitis pigmentosa (RP) is a group of inherited retinal diseases.
• Blood-ocular barrier (BOB) integrity is crucial for retinal health.
• Quantifying BOB impairment in RP can provide insights into disease mechanisms.

Purpose of the Study:

• To quantify blood-ocular barrier (BOB) impairment in retinitis pigmentosa (RP) by measuring aqueous flare.
• To investigate clinical correlations of BOB impairment in RP patients.

Main Methods:

• Aqueous flare was measured using a laser flare-cell meter in 49 RP patients and 85 controls.
• Clinical parameters including cystoid macular edema (CME) and optic nerve head pallor were assessed.
• Statistical analyses included t-tests, Mann-Whitney U-test, chi-squared test, and regression analysis.

Main Results:

• RP eyes showed significantly higher aqueous flare (10.11 +/- 3.53) compared to normal controls (3.89 +/- 0.94; P < 0.001).
• Clinically significant CME was observed in 26% of RP eyes, notably higher in autosomal dominant RP (69%).
• CME was strongly associated with aqueous flare values (r = 0.84; P < 0.01).

Conclusions:

• RP eyes demonstrate increased aqueous flare, signifying compromised blood-ocular barriers.
• Elevated aqueous flare in RP is associated with cystoid macular edema (CME).
• Autosomal dominant RP shows a higher prevalence of CME and associated aqueous flare.