Opacification of the lens in the eye is called a cataract. Cataracts that appear in infants or childhood are generally called congenital or developmental cataracts. They may arise from a variety of causes including various general developmental syndromes, intrauterine infections such as rubella, chromosomal abnormalities, or inherited disorders of metabolism such as galactosemia. About one-fourth appear multiple times within families for which no other cause can be found and these are usually inherited from single gene mutations.
Early onset cataracts that are inherited are often present to some degree at birth but may not be detected until later. Lamellar cataracts are usually detected in the first years of life but may be present at birth. This is why all newborns should have a complete eye examination. Early detection is important to prevent lazy eye (amblyopia). Inherited forms of cataracts are usually bilateral as is the case in this disorder. Since these are often progressive, serial monitoring is required so that cataract surgery can be performed at an appropriate time.
However, it is common for nearly everyone to have small, visually insignificant opacities in the lenses that do not progress and cause no difficulty in seeing. In other words, not all cataracts need to be removed.
Simply inherited developmental cataracts such as these are often inherited in an autosomal dominant pattern. When one parent has such a cataract, he or she can expect that half of their children on average will inherit this type of cataract.
Cataracts are diagnosed by eye doctors but it is important that pediatricians and family doctors are involved as well to ensure that they are not part of a more generalized disorder. Timely removal of visually significant cataracts is essential to ensure that infants and children retain good vision into adult life.