A New Classification for Retinitis Pigmentosa Including Multifocal Electroretinography to Evaluate the Disease Severity

Aim: To establish a useful and objective classification for retinitis pigmentosa (RP) to evaluate the disease severity. Methods: This is retrospective cross-sectional study. Visual acuity (VA), visual field (VF) width, ellipsoid zone width on optic cohorence tomography (OCT) multifocal electroretinography (mf ERG) values were obtained from medical records of patients with RP. A scoring criterion was developed wherein each variable assigned score 0 5 depending its distribution. The cumulative (from 20) used classify severity grade 5. scores correlated other final grade. Results: Data 152 eyes 92 who had results all tests reviewed. mean age 41.2 years. VA 0.13 ± 0.16 Snellen lines. majority less than 20/40 (88.6%), smaller 20˚ (78%), an 7˚ (84.4%). (85.4%) in advanced stage (Grade 4 5). Conclusions: We present simple, easy use RP which can be categorize compare treatment results.