SS-HH-OCT as a Novel Diagnostic Modality for Early-Onset Retinal Dystrophies (EORDs)

Inclusion Criteria: For all participants: * Participant's age is between 0 through 8 years (\<9 years) * Parent/legal guardian gives consents for the imaging study * No ocular media opacities that could preclude imaging * Refractive error equal or lower than 6 diopters For EORD participants (Groups 1-2): Meets clinical and molecular diagnosis of EORD (clinical determined by PI). Molecular diagnosis criteria: * Autosomal dominant gene: One pathogenic or likely pathogenic variant that meets the clinical phenotype * Autosomal recessive gene: two pathogenic or likely pathogenic variants in-trans which meet the phenotype. * X-linked gene: one pathogenic or likely pathogenic variant which meets the phenotype. For Controls (Group 3): No evidence of retinal pathology Exclusion Criteria: For all participants: * Parent/legal guardian unwilling or unable to provide consent * Refractive error higher than 6.00 diopters * Participant has media opacities that preclude imaging * Any non-IRD ocular condition that confound results interpretation such as glaucoma, uveitis, neurologic conditions affecting the optic nerve, etc. For EORD participants (Groups 1-2): Does not meet molecular diagnosis criteria For Controls (Group 3): Any suspicion of IRD