Since CD44 is expressed in reactive microglia cells from Cngb1-knockout retinas [20] and from retinas following endotoxin induced uveitis [32], we analyzed retinal sections and retinal flatmounts from 12-week-old ST/ST mice that were co-immunostained for IBA1 to visualize microglia/macrophages and CD44. Here, CD44 is linked to uveitis.