Corneal Ectatic Conditions Modified

Corneal ectatic conditions  Inflammator y:



Keratoectasia

Non inflammator y:

Keratoconus

Ant.staphyloma

Keratoglobus Pellucid marginal deg. 

Keratoectasia: protrusion of corneal scar without iris incarceration.



Ant.staphyloma(pseudo cornea): protrusion of corneal scar with iris incarceration.



Keratoconus: if protrusion in the centre of cornea(+ve Munson's sign).



Keratoglobus: : if protrusion in corneal curvature all around.



Pellucid marginal degeneration: protrusion in lower third of cornea( from 4-8 o'clock) ,treated by: hard cl & pkp

N.B. -rupture of descment's membrane

corneal edema.

-Rupture of bowman's membrane

corneal opacity.

-Acute hydrops: corneal edema due to descment's membrane destructionand enterance of aqueous humor inside cornea.

keratoglobus -Bilateral corneal ectasia and thinning -Large corneal curvature -Normal diameter -Deep A.C & normal angle [email protected]

A.M.E.G

-Treated by:  protection of cornea from trauma  Large sclera CL

.

Treatment of corneal opacity

Treatment of corneal edema

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Effect of Trauma on Cornea 

Types of trauma

1. Blunt trauma

2.Foreign Body 3.Physical Trauma 4.Chemical Trauma 5.Penetrating Trauma 6.Iatrogenic

 Corneal abrasion  Common with: -Finger nails -Paper cuts -Mascara brush Hair brush

• Abrasion • Recurrent Corneal Erosion • Laceration • Intracorneal Hematoma • Blood Staining, Rupture, Edema

 treatment: o Antibiotic o Cycloplegic Mydriatic o Cover For 24hoursby Patch Or Cl

 Intracorneal hematoma Occur in previously vascularised (injured) cornea following blunt trauma 

Corneal Foreign Body

You shoud remove f.b with its rust

 Laceration

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

Physical Corneal Injury

u.v keratopathy is common •

welding

•

exposure to sun lamps

•

snow or water skiing

 treatment: o analgesic o cycloplegic mydriatic o cover for 24hoursby patch or cl

with

 Thermal Corneal Trauma  trauma with:

-cigarettes

-loss of epithelium and stroma

-hot metals

-edema

-hot oils  treatment: i. removal of any debris ii. debridment of necrotic epithelium iii. cycloplegic mydriatic iv. antibiotic + cortisone

-conj hyperemia &chemosis

 Chemical trauma Chemical injuries: • Caustics as fresh lime • Acids as conc HCl & H2SO4 . [email protected]

A.M.E.G

• • •

Alkalis as NaoH Iodine Aniline

 treatment: o Continous Wash With Saline Or Even Tap Water Till Ph Become Neutral o Alteration Of PH (If Acidic Give Alkaline And Vice Versa o Cortisone to inhibit fibrosis o Cover o Cycloplegic Mydriatic o Antibiotic

N.B. alkalis is more dangerous than acids, as acids cause coagulation of proteins making a barrier preventing further penetration

& stop any decongestant

n.b. this is the extras of of the 2nd lecture of dr Sameh

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A.M.E.G