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Related to primary vitreous: secondary vitreous, Persistent Hyperplastic Primary Vitreous, Vitreous fluid
the vitreous first formed in the embryo between the optic cup and the lens vesicle, and later vascularized by the hyaloid artery and its branches.
1. glasslike or hyaline.
2. the vitreous body.
see vitreous body.
an opacity of the vitreous which occurs with uveitis.
a small opacity in the vitreous which may stimulate the retina and cause abnormal behavior patterns such as 'fly-biting'.
1. vitreous body.
2. the watery substance contained within the interstices of the stroma in the vitreous body.
that adjacent to the optic disk.
persistent hyperplastic vitreous
a congenital anomaly, usually unilateral, due to persistence of embryonic remnants of the fibromuscular tunic of the eye and part of the hyaloid vascular system. Clinically, there is a white pupil, elongated ciliary processes, and often microphthalmia; the lens, although clear initially, may become completely opaque.
1. Descemet's membrane.
2. hyaline membrane (1).
3. Bruch's membrane.
4. a delicate boundary layer investing the vitreous body.
the first stage in development of the vitreous; it persists in the adult as Cloquet's canal.
the secondary stage in development of the vitreous; an avascular mass secreted by the retinal ectoderm.
the third and final stage of development of the vitreous; it is secreted by the ciliary epithelium and persists in the adult as the suspensory ligament of the lens.
curtain-like opacities seen in a normal vitreous.