This study examined the visual function of zebrafish lacking *rlbp1b* (encoding the Müller glia–specific CRALBP1 paralog) at juvenile stages, after rod photoreceptors have been incorporated into the retina, using electroretinography (ERG) under dark-adapted conditions.
Juvenile *rlbp1b* mutants showed reduced b-wave amplitudes on ERG under dark-adapted conditions, plus progressively prolonged time-to-peak at higher light intensities — defects absent in early larval (cone-dominant) stages.
Full-text was not accessible; findings are based solely on the abstract. The study uses a zebrafish model, which may not fully translate to human retinal disease. No sample sizes or statistical details are reported in the available text.
Müller glia–mediated chromophore recycling becomes functionally critical once rods mature in the retina; testing visual pigment recycling disorders should account for both retinal maturation stage and lighting conditions.
