CORNEAL OEDEMA

 Corneal oedema

The water content of normal cornea is 78 percent. It is kept constant by a balance of factors which draw water in the cornea (e.g., intraocular pressure and swelling pressure of the stromal matrix = 60 mm of Hg) and the factors which draw water out of

KERATOCONUS , KERATOGLOBUS , KERATOCONUS POSTERIOR

KERATOCONUS
Keratoconus (conical cornea) (Fig. 1) is a noninflammatory bilateral (85%) ectatic condition of cornea in its axial part. It usually starts at puberty and progresses slowly.

Etiopathogenesis. It is still not clear. Various theoriesproposed so far label it as developmental condition,degenerative condition, hereditary dystrophy and

POSTERIOR CORNEAL DYSTROPHIES

Cornea Guttata of vogt
This condition is characterised by drop-like excrescences involving the entire posterior surface of Descemet's membrane. These are similar to Hassal- Henle bodies which represent the age change and are mainly found in the

STROMAL CORNEAL DYSTROPHIES

Granular dystrophy
Also known as 'Groenouw type I, is an autosomal
dominant dystrophy characterised by milky-granular
hyaline deposits in anterior stroma. Intervening
stroma is

Anterior corneal dystrophies

ANTERIOR DYSTROPHIES

Epithelial basement membrane dystrophy
Also known as Cogan's microcystic dystrophy and
map-dot finger print dystrophy, is the most common
of all corneal dystrophies seen in working age adults.
The typical lesions, involving corneal