Ultrasonography: if posterior eye segments cannot be assessed properly due to clouding of the lens.Posterior type: Retinal detachment and retinal dysplasia are possible.Ciliary body villi are displaced towards the center and are visible in the pupil.Vascularized whitish retrolental tissue.Lens changes (clouded membrane → membranous cataract).Reduced visual acuity up to complete loss of vision.Failure of the embryonic primary vitreous and hyaloid vascular system to regress during gestation.Definition: persistent embryonic tissue, which blocks the light passing to the back of the eye.
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