What do you call an eye that has not fully developed?

An eye that has not fully developed is often referred to as an "immature eye" or "underdeveloped eye." In medical terms, conditions such as "retinopathy of prematurity" can occur in premature infants, where the retina is not fully developed. Additionally, congenital conditions can lead to incomplete eye development, which may be described as "congenital eye anomalies."