Cortical ignorance of one eye Lazy eye Incidence 24 of the general population The most common cause of visual loss under 20 years of life Binocular Vision What if images were totally different or grossly ID: 1034593
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1. AMBLYOPIA
2. AmblyopiaDecrease in visual acuity of one eye without the presence of an organic cause that explains that decrease in visual acuity.Cortical ignorance of one eye.Lazy eye.
3. Incidence2-4% of the general population.The most common cause of visual loss under 20 years of life.
4. Binocular Vision .
5. What if images were totally different or grossly differnet ?Diplopia.Confusion.Suppression.
6. Why fusion may fail ?significant anisometropia.significant aniseikonia (difference in image size)Strabismus.Higher cortical problems ( e.g: head trauma, alcohol intake , drugs , … etc).
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8. 8Mild hyperopic or astigmatic anisometropia (1-2D) mild amblyopiaMild myopia anisometropia (less than -3D) usually doesn't cause amblyopia unilateral high myopia (-6D) sever amblyopia visual loss.The eye s of a child with anisometropic amblyopia look normaly to the family and primary care physician.
9. Types of amblyopia1- Strabismic
10. Types2- Deprivation amblyopia
11. Results in more severe visual impairment than strabismic or refractive amblyopiaCONG CATARACT Cataracts and corneal opacities. Eyelid ptosis, eyelid hemangiomaDeprivational Amblyopia
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13. Types3- Anisometropic amblyopia ( refractive amblyopia)More common with hypermetropic anisometropia( Astigmatic ( Meridional) amblyopia=
14. TREATMENT Treat the cause of amblyopia: correct the rfractive error , remove the media opacity surgically . The younger the child , the better out come of amblyopia therapy . The first five years of child age is the sensitive period where amblyopia can be reversed , after that it become more difficult .
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