topicLutein Supplementation Visual Fatigue Randomized Trial
claim7 9 The standard of care for many IRDs has largely focused on managing associated complications and the use of optical aids to improve quality of life.
evidence level4
citationBarthelemy Normila (2026)
sourceNutritional supplements: current evidence for retinitis pigmentosa and Stargardt disease
topicLutein Supplementation Visual Fatigue Randomized Trial
claimThis review synthesizes both historical and contemporary evidence regarding dietary and nutritional interventions for IRDs.  14 Retinitis pigmentosa is one of the most common IRDs and is characterized by progressive photoreceptor cell death.
evidence level4
citationBarthelemy Normila (2026)
sourceNutritional supplements: current evidence for retinitis pigmentosa and Stargardt disease
topicLutein Supplementation Visual Fatigue Randomized Trial
claimBy applying next-generation sequencing (NGS) technology to DNA samples stored from patients of the previous vitamin A trials, they were able to identify the specific RP gene variants for most participants and the lack of protective effect across genetic subtypes such as,and-associated retinitis pigmentosa [].
evidence level4
citationBarthelemy Normila (2026)
sourceNutritional supplements: current evidence for retinitis pigmentosa and Stargardt disease
topicLutein Supplementation Visual Fatigue Randomized Trial
claim1 4 5 6 Inherited retinal diseases (IRDs) comprise a complex group of heterogenous disorders that lead to progressive retinal cell death and functional vision loss.
evidence level4
citationBarthelemy Normila (2026)
sourceNutritional supplements: current evidence for retinitis pigmentosa and Stargardt disease