Vitamin A deficiency and the retinal "double carrot" sign with optical coherence tomography.
Mark P BreazzanoJin Kyun OhSean A BatsonJulia A KucherichRabia KaraniCaitlin M RohrmannJanet R SparrowSerena FragiottaStephen H TsangPublished in: Eye (London, England) (2022)
Structural improvement of the proposed "double carrot" sign occurs soon after vitamin A supplementation. While scotopic function improves rapidly following supplementation, cone function recovers more slowly. Therefore, foveal changes such as the "double carrot" sign suggest that structural recovery of cones precedes functional recovery.