Kidneys: Horseshoe, aplastic, dysplastic, or hypoplastic kidneys. Eyes: Strabismus, optic nerve hypoplasia[36] (which may cause light sensitivity, decreased visual acuity, or involuntary eye movements). Occasional problems: ptosis of the eyelid, microphthalmia, cleft lip with or without a cleft palate, webbed neck, short neck, tetralogy of Fallot, coarctation of the aorta, spina bifida, and hydrocephalus.