ย 

Lost fovea!

๐‹๐จ๐ฌ๐ญ ๐Ÿ๐จ๐ฏ๐ž๐š!โฃ

โฃ

๐˜–๐˜ค๐˜ถ๐˜ญ๐˜ฐ๐˜ค๐˜ถ๐˜ต๐˜ข๐˜ฏ๐˜ฆ๐˜ฐ๐˜ถ๐˜ด/ ๐˜–๐˜ค๐˜ถ๐˜ญ๐˜ข๐˜ณ ๐˜ˆ๐˜ญ๐˜ฃ๐˜ช๐˜ฏ๐˜ช๐˜ด๐˜ฎโฃ

โฃ

Albinism is a congenital disorder causing reduced pigmentation due to complete or partial absence of melanin pigment affecting the skin, hair and eye.โฃ

โฃ

Absence or defect of tyrosinase which is involved in production of melanin.โฃ





โฃ

๐˜›๐˜ธ๐˜ฐ ๐˜ต๐˜บ๐˜ฑ๐˜ฆ๐˜ด:โฃ

โฃ

๐Ž๐œ๐ฎ๐ฅ๐จ๐œ๐ฎ๐ญ๐š๐ง๐ž๐จ๐ฎ๐ฌ ๐š๐ฅ๐›๐ข๐ง๐ข๐ฌ๐ฆโฃ

โ— Involves the eye, skin and hairโฃ

โ— Autosomal recessiveโฃ

โ— Many types - OCA Type 2 is the most common typeโฃ

โฃ

๐Ž๐œ๐ฎ๐ฅ๐š๐ซ ๐š๐ฅ๐›๐ข๐ง๐ข๐ฌ๐ฆโฃ

โ— Limited to the eyesโฃ

โ— X linked recessiveโฃ

โ— Two types (1 and 2)โฃ

โฃ

๐˜Š๐˜ญ๐˜ช๐˜ฏ๐˜ช๐˜ค๐˜ข๐˜ญ ๐˜ง๐˜ฆ๐˜ข๐˜ต๐˜ถ๐˜ณ๐˜ฆ๐˜ด:โฃ

โฃ

โ— Poor visual acuityโฃ

โ— Strabismus & Amblyopiaโฃ

โ— Photophobia - Sensitivity to bright light and glareโฃ

โ— Refractive errors- Hypermetropia/Myopia, Astigmatism is very commonโฃ

โ— Pendular nystagmusโฃ

โ— Iris transillumination defectsโฃ

โ— Depigmented fundusโฃ

โ— ๐…๐จ๐ฏ๐ž๐š๐ฅ ๐ก๐ฒ๐ฉ๐จ๐ฉ๐ฅ๐š๐ฌ๐ข๐š - absence of the foveal pitโฃ

1. RPE pigmentation is inappropriate for macular developmentโฃ

2. OCT will show absence of normal foveal pitโฃ

3. Foveal avascular zone is small or coexistent with vessels crossing the area 2 discโฃ

diameter temporal to the optic disc marginโฃ

4. Contributes to poor visual acuityโฃ

โ— Abnormal decussation of the visual pathwayโฃ

1. Crossing of upto 90% of the fibres at the chiasma to the contralateral sideโฃ

2. Loss of stereopsis and strabismusโฃ

โฃ

๐˜Š๐˜ฐ๐˜ฎ๐˜ฎ๐˜ฐ๐˜ฏ ๐˜ด๐˜บ๐˜ด๐˜ต๐˜ฆ๐˜ฎ๐˜ช๐˜ค ๐˜ข๐˜ด๐˜ด๐˜ฐ๐˜ค๐˜ช๐˜ข๐˜ต๐˜ช๐˜ฐ๐˜ฏ๐˜ด:โฃ

โฃ

1. Hermansky Pudlak syndrome (platelet storage deficiency)โฃ

2. Chediak-Higashi syndrome (abnormal lysosomal trafficking- recurrent infections)โฃ

โฃ

๐˜›๐˜ณ๐˜ฆ๐˜ข๐˜ต๐˜ฎ๐˜ฆ๐˜ฏ๐˜ต:โฃ

โฃ

โ— Recognize refractive errors and treat to minimize amblyopiaโฃ

โ— Low vision examination and visual rehabilitationโฃ

โ— Sunglasses to reduce photosensitivityโฃ

โ— Prisms can help reduce nystagmusโฃ

โ— Genetic counsellingโฃ

โ— Surgery to align the eyes, when necessaryโฃ

โฃ

www.ophthalmobytes.comโฃ

โฃ

Image from Rajan Eye Care Hospital

#ophthalmology #ophthal #doctor #health #medical #vision #education #optometry #medicalstudent #optometrist #medicine #eye #ophtho #ophthalmologist #ophthalmo #med #medicaleducation #ophthalmologyresident #ophthalmologyresidency #retina #fovea #albinism #oculocutaneousalbinism #ocularalbinism #macula #melanin #fovealpit #fovealhyoplasia

47 views0 comments

Recent Posts

See All
ย