This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ocular Embryology& Anatomy, Subject name: Ophthalmology
Sites at which the uvea is attached to the sclera include all of the following except 
Select and explain. 
A. Voex veins, B. Optic nerve, C. Scleral spur, D. Ora serrata
D: Ora serrata
Answer: D: Ora serrata 
Explanation: Uvea is made up of Iris, Ciliary body and Choroid. Uvea is attached to sclera at 3 points 1. Scleral spur 2. Optic nerve 3. Exit point of voex veins The ora serrata is not a point of attachment of choroid to sclera - it is the attachment of the neurosensory retina and choroid. Ora Serrata is the serrated peripheral margin where the retina ends. Here the retina is firmly attached both to the vitreous and the choroid