Published on July 7, 2016
1. Development of the eye From weeks 4 to week 40
2. Origination of the eye • It forms when the crest like neural folds appear in the head, thus forming the optic sulcus • T h e eye later f o r m s by evagination, and formation of the stalk known as optic stalk • By 5 weeks the lenses invaginate and form the optic cup • By 6 weeks the eyes are pigmented • By 10 weeks the eyelids form and close • BY WEEK 15, ciliary body begins to form • By week 40-Tear ducts are apparent which makes the human cry
3. Week 2 (19 days) In the region where the eyelids form and the eyeball form, the optic fields are found in the face of the embryo By later, the eye fields migrate ventrally and the eye is formed
4. Week 3 (22 days) The neural folds form and elevate, which the eyes form from the separate fields, that give rise to the eyes
5. Week 3 (27 days) By the end of week 3 the optic vesicle is formed. An area of indentation were the lens vesicle of forms is the lens placode As the embryo grows the optic cup is formed
6. Week 4 to 5 By beginning of 4 weeks the lens placode is formed. It deepens to form the lens pit, which deepens further to form the lens vesicle
7. Week 6-7 By 6 to 7 weeks the optic cup is formed. The optic cup contains two layers, retinal pigment layer, and retina; layer’s itself By 7 weeks thin rims appear in edges pot of the eye include the eyelid primordia
8. Week 8-10 By week 8 the eyes begin to form eyelids By week 9-10 the eyelids fuse and open at the 3rd trimester
9. Weeks 10-15 • Ciliary body forms in the edges of the iris • Beginning of eye maturation
10. Week 10-15 Ciliary bud forms
11. Week 40 • Eyes open for first time • Tear ducts formed, which allows the baby to cry even in older ages
12. Baby crying
13. Adult • Also cries like babies • Open and closes eyelids to lubricate the eyes
14. Parts of a human eye Vitreous humor Choroid Retina Lens Iris Anterior chamber Posterior chamber Pupil Ciliary body Optic nerve (innervates the eye)
DEVELOPMENT OF THE EYE. by Victoria Ort, Ph.D and David Howard, M.D. Objectives I. Introduction II. Development of the Optic Cup and Lens Vesicle
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