Developmental cataract is an opacity of the crystalline lens that develops during childhood, often after birth, while the eye and visual system are still maturing. It may be inherited, occur without an identified cause, or be associated with metabolic disease, infections, trauma, medications, or other ocular/systemic disorders.

What is happening:

It differs from the usual age-related cataract because it occurs before visual development is complete. Management depends on visual significance: small non-central opacities may be observed with refraction and amblyopia monitoring; visually significant cataracts often require prompt pediatric ophthalmology assessment and sometimes surgery, followed by optical correction and amblyopia therapy. The AAO pediatric cataract overview emphasizes that delayed treatment can permanently affect vision because visual development continues through childhood.

Amblyopia (lazy eye) is reduced vision in one or both eyes due to abnormal visual development in early childhood, despite no structural abnormality that fully explains the visual loss and despite appropriate optical correction.

It happens because the developing brain receives a blurred, unequal, or blocked image and learns to suppress that eye's input.

Common causes are:

Early detection and treatment are important because untreated amblyopia can cause permanent visual impairment. The AAO explanation describes it as vision that fails to develop properly because the brain ignores input from the affected eye.