corneal opacity

CORNEAL OPACITY

S.BAVADHAARINI

DEFINITION Corneal opacity literally means loss

of normal transparency of cornea due to scarring

CAUSES: Healed corneal wounds Healed corneal ulcers Congenital opacities –

developmental anamolies / birth trauma

RISK FACTORS Vitamin A deficiency Measles result in scarring /infection

of eye Eye injury-chemical agents &

foreign bodies Pink eye/ inclusion conjunctivitis Wearing contact lenses overnight Cold sores

SYMPTOMS Reduced vision / loss of vision Pain Redness Photophobia Certain areas of eye appearing

cloudy / milky

TYPES OF CORNEAL OPACITY

ANTERIOR STAPHYLOMA

LEUCOMA& ADHERENT LEUCOMA

MACULA

NEBULA

NEBULA Faint opacity due to superficial scars

involving bowmans layer & superficial stroma

Covers the pupillary area & interferes more with vision

Blurring of vision & irregular astigmatism

MACULA Corneal opacity caused by scarring

of about half of the corneal stroma

LEUCOMA Dense white opacity due to scarring of

more than half of the corneal stroma ADHERENT LEUCOMA seen when healing occurs after

perforation of the cornea with incarceration of iris

ANTERIOR STAPHYLOMA Ectasia of pseudocornea that

results after total sloughing of cornea with iris plastered behind it

CORNEAL FACET Corneal surface is depressed at the site

of healing due to less fibrous tissue,such a scar is called FACET

KERACTASIA Corneal curvature is increased at the

site of opacity due to weak scar

2’ CHANGES

HYALINE

PIGMENTATION

CALCAREOUS

ATHEROMATOUSULCERATION

TREATMENT PHOTOTHERAPEUTIC KERATECTOMY: Excimer laser done in nebula

OPTICAL IRIDECTOMY: central macular /leucomatous corneal opacity

KERATOPLASTY