Corneal odema

1. CORNEAL ODEMA ,COLOR
BLINDNESS & CONGENITAL
CORNEAL OPACITY

3. Corneal odema
• Normal water content of cornea is 78 %
• it is maintained by balance between the factors which draw water into
cornea ( IOP and Swelling pressure = 60mmhg) and draw water out of cornea
(active pump of endothelieum).
• distrubance in any of these lead to corneal odema
• more than 78% water conent lead to increased CCT and decreased
transparency

4. causes
• Raised IOP
• Endothelial damage
• Birth trauma
• Corneal dystrophy
• Uveitis , endophthalmitis
• Burns

5. Clinical Features
• Initial stage - Stromal Haze with reduced vision
• Long standing - marked loss of vision , pain , photophobia ,epithelial
vesicle with bullae formation

6. Treatment
• Treat the underlying cause ( raised IOP)
• Hypertonic agents for Rx dehydration of cornea
• Hot forced air from hair dryer
• soft contact lens
• Penetrating keratoplasty

7. causes of congenital corneal opacity
• STUMPED
• S-sclerocornea
• T-Tears in DM, Congenital Glaucoma , Birth trauma
• U-Ulcer,
• M-Metabolic disorders
• P-Peters anamoly
• E-Endothelial dystrophy
• D-Dermoid

8. Causes of colour blindness
• Congenital -
1) Dyschromatopsia-
a)Anamalous trichromactic- Protanomalous,Deuteranomalous,Tritanomalous
b)Dichromactic- Protanopia,Deuteranopia,Tritanopia
c)Blue cone monochromatism
2) Achromatopsia- Rod Monochromatism
• Acquired -
1) Blue Yellow Impairment -CSR,Macular oedema
2) Red Green deficiency-Optic neuritis,Lebers optic atrophy,
3) Acquired blue color defect - Old age due to sclerosis of lens