Upload
vian
View
68
Download
4
Tags:
Embed Size (px)
DESCRIPTION
Pediatric Optometry . Lecture 1 Ocular embryology Mutez Gharaibeh,MD. 22/10 ……… . 29/10 ……… . 5/11 ………… 12/11 ……… . 19/11 ……… . First 26/11 ……… . 3/12 ………… 10/12 ……… . 17/12 ……… . 24/12 ……… . 31/12 ……… . 7/1 ………… .. Second 14/1 ………… last date to deliver the report - PowerPoint PPT Presentation
Citation preview
Pediatric Optometry Pediatric Optometry Lecture 1 Lecture 1
Ocular embryologyOcular embryologyMutez Gharaibeh,MDMutez Gharaibeh,MD
► 22/10……….22/10……….► 29/10……….29/10……….► 5/11…………5/11…………► 12/11……….12/11……….► 19/11………. 19/11………. FirstFirst► 26/11……….26/11………. ► 3/12…………3/12…………► 10/12……….10/12……….► 17/12……….17/12……….► 24/12……….24/12……….► 31/12………. 31/12………. ► 7/1………….. 7/1………….. SecondSecond► 14/1…………14/1…………last date to deliver the reportlast date to deliver the report ► 22/1…………22/1………… FinalFinal
►First : 25 marks .First : 25 marks .►Second : 25 marks .Second : 25 marks .►Report: 10 marks .( How to prescribe Report: 10 marks .( How to prescribe
eyeglasses in children ).eyeglasses in children ).►Final : 40 ( 30+10 marks).Final : 40 ( 30+10 marks).►10 marks : evaluation.10 marks : evaluation.
http://www.med.unc.edu/embryo_imaghttp://www.med.unc.edu/embryo_images/unit-eye/eye_htms/eye016.htmes/unit-eye/eye_htms/eye016.htm
[email protected]@yahoo.com
Weeks 3-4Weeks 3-4
CAUDAL
ROSTRAL
Anterior neural plate
Eye fields
Prosencephalon(forebrain)
►Optic sulcus Optic sulcus ►Optic grooveOptic groove►Optic vesicles.Optic vesicles.
►Neuroectoderm.Neuroectoderm.- Retina , Iris , - Retina , Iris , Optic nerve.Optic nerve.
►Surface ectoderm.Surface ectoderm.- Lens.- Lens.
► Mesoderm.Mesoderm.- vascular and fibrous- vascular and fibrous coats of the eye.coats of the eye.
Optic groove
Ectoderm
Lens placode
Optic vesicle
Choroidal fissure normally closes by the 6Choroidal fissure normally closes by the 6thth week. week.
Optic vesicle
Hyaloid artery.
Iris colobomasIris colobomas
Retinal colobomaRetinal coloboma
Persistent hyaloid arteryPersistent hyaloid artery
Bergmeister papillaMittendorf dot
PHPVPHPV►Persistent hyperplastic primary Persistent hyperplastic primary
vitreous .vitreous .
Leukocorea
CorneaCornea►Surface epithelium- etoderm.Surface epithelium- etoderm.
► Inner layers – Neural crest cells.Inner layers – Neural crest cells.
Optic nerve myelinationOptic nerve myelination► Incomplete @ birth.Incomplete @ birth.►Complete by 10 weeks of life.Complete by 10 weeks of life.►Stops off the optic never head.Stops off the optic never head.
EyelidsEyelids
►Fuse by the beginnig of second Fuse by the beginnig of second trimester ( 13-14weeks of trimester ( 13-14weeks of embryogenesis).embryogenesis).
►Remain adherent until about the 26 Remain adherent until about the 26 week of embryogenesis. week of embryogenesis.
Microphthalmia
►Microphthalmia.?Microphthalmia.?►Nanophthalmia.?Nanophthalmia.?►Anophthalmia.?Anophthalmia.?►Cryptophthalmia.Cryptophthalmia.؟؟►Cyclopia.?Cyclopia.?