pediatric optometry
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 PresentationTRANSCRIPT
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Pediatric Optometry Pediatric Optometry
Lecture 1 Lecture 1
Ocular embryologyOcular embryology
Mutez Gharaibeh,MDMutez Gharaibeh,MD
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► 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
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►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.
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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
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Weeks 3-4Weeks 3-4
CAUDAL
ROSTRAL
Anterior neural plate
Eye fields
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Prosencephalon(forebrain)
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►Optic sulcus Optic sulcus ►Optic grooveOptic groove►Optic vesicles.Optic vesicles.
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►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.
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Optic groove
Ectoderm
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Lens placode
Optic vesicle
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Lens vesicle
Optic stalk
Surface ectoderm
Optic cup
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Choroidal fissure normally closes by the 6Choroidal fissure normally closes by the 6thth week. week.
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Optic vesicle
Hyaloid artery.
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Iris colobomasIris colobomas
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Retinal colobomaRetinal coloboma
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Persistent hyaloid arteryPersistent hyaloid artery
Bergmeister papillaMittendorf dot
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PHPVPHPV
►Persistent hyperplastic primary Persistent hyperplastic primary vitreous .vitreous .
Leukocorea
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CorneaCornea
►Surface epithelium- etoderm.Surface epithelium- etoderm.
► Inner layers – Neural crest cells.Inner layers – Neural crest cells.
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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.
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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.
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Microphthalmia
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►Microphthalmia.?Microphthalmia.?►Nanophthalmia.?Nanophthalmia.?►Anophthalmia.?Anophthalmia.?►Cryptophthalmia.Cryptophthalmia.؟؟►Cyclopia.?Cyclopia.?