👉 Retronectes is a type of retinoblastoma, also known as a retinoid deficiency syndrome. This condition affects the retina, which plays a crucial role in vision and vision transmission. It typically occurs due to a deficiency or dysfunction of one of the retinal pigment epithelial cells (RPE) in the eye. Retronectes can be caused by a variety of factors, including genetic mutations, environmental exposures, or congenital abnormalities.