<prompt> Neural ectoderm derivatives are:Corneal stromaCilliary epitheliumIris stromaCorneal epithelium  <response>: B i.e. Cilliary epithelium; E i.e. Sphincter and dilator pupillae musclesNeural crest cells form the mesenchyme of head neck and contribute to most of the eye including endothelium of cornea trabecular meshworkQ stroma of cornea, iris, ciliary body and choroid; melanocytes of conjunctiva uvea; ciliary muscle ganglion nerves Schwann cells; Orbital bones connective tissue; connective sheath muscle layer of orbital blood vessels; meningeal sheath of optic nerve, sclera pa of vitreous.All Epithelia except that of iris ciliary body, the lens and the Lacrimal Tarsal glands are derived from the surface ectodermQ. Iris and ciliary body epitheliumsQ are derived from neural ectoderm.Structures derived from neural ectoderm include Iris Ciliary body Epithelium, Smooth muscles of iris constrictor dilator pupilae, Retina REE 9 sensory layers, Vitreous pas, Optic Nerve, Cup and Vesicle. Mn: ICE I see smooth constricted Dilated Retinal vital pas of Optic NCV nerve conduction velocityMelanocytes present in iris stroma develop from neural crest.Sclera is of neural crest and mesodermal originQLacrimal tarsal glands, epithelium of cornea conjunctiva, and crystalline lens develops from surface epitheliumQ; whereas sclera is mesodermalQ in origin.Usually the epithelium develop from ectoderm; muscles from paraxial mesoderm. But the unique feature of iris is that its epithelium and musculature constrictor dilator pupillae develop from Neuroectoderm.Q 