Choroid Choroid The choroid, also known as the choroidea or choroid coat, is the vascular layer of the eye, containing connective tissues, and lying between the retina and the sclera. The human choroid is thickest at the far extreme rear of the eye (at 0.2 mm), while in the outlying areas it narrows to 0.1 mm. The choroid provides oxygen and nourishment to the outer layers of the retina. Along with the ciliary body and iris, the choroid forms the uveal tract. The structure of the choroid is generally divided into four layers (classified in order of furthest away from the
The University of Illinois Eye and Ear Infirmary over 3,000 eye operations each year. Fellowships in ophthalmology span the following subspecialties: Cornea, Glaucoma, Neuro-ophthalmology, Oculoplastics, Pediatric Ophthalmology and Strabismus, and Vitreoretinal Disease. Research fellowships in artificial Cornea Research, Cornea Neurobiology & Ocular Surface Disease, and Oculoplastic pre-residency are also available. The Otolaryngology Department, offers services in six subspecialties - Facial Plastic and Reconstructive Surgery, Speech and Voice Care, Sinus & Nasal Allergy, Oncology and Neurology, Cancer of the Head and Neck, and General Otolaryngology - treated nearly 17,000 patients in 2008, the most recent year for which statistics are available, making it one of the busiest programs in