Editing Amblyopia (section)

=== Deprivation and occlusion ===
Deprivation amblyopia (amblyopia ex anopsia) results when the ocular media become [[Opacity (optics)|opaque]], such as is the case with [[congenital cataract]] or [[cornea]]l haziness.<ref name=Angell>{{cite journal | vauthors = Angell LK, Robb RM, Berson FG | title = Visual prognosis in patients with ruptures in Descemet's membrane due to forceps injuries | journal = Archives of Ophthalmology | volume = 99 | issue = 12 | pages = 2137–9 | date = December 1981 | pmid = 7305711 | doi = 10.1001/archopht.1981.03930021013004 }}</ref> These opacities prevent adequate visual input from reaching the eye, and disrupt development. If not treated in a timely fashion, amblyopia may persist even after the cause of the opacity is removed. Sometimes, drooping of the [[eyelid]] ([[ptosis (eyelid)|ptosis]]) or some other problem causes the upper eyelid to physically occlude a child's vision, which may cause amblyopia quickly.  Occlusion amblyopia may be a complication of a [[hemangioma]] that blocks some or all of the eye. Other possible causes of deprivation and occlusion amblyopia include obstruction in the vitreous and [[aphakia]].<ref name=":0">{{Cite journal|last1=Antonio-Santos|first1=Aileen|last2=Vedula|first2=S. Swaroop|last3=Hatt|first3=Sarah R.|last4=Powell|first4=Christine|date=23 March 2020|title=Occlusion for stimulus deprivation amblyopia|journal=The Cochrane Database of Systematic Reviews|volume=3|issue=3 |pages=CD005136|doi=10.1002/14651858.CD005136.pub4|issn=1469-493X|pmc=7089638|pmid=32203629}}</ref> Deprivation amblyopia accounts for less than 3% of all individuals affected by amblyopia.<ref name=":0" />