What is dellen?
Corneal thinning adjacent to raised corneal/limbal lesions
What causes dellen?
Poor fitting RGPS
What time of day is exposure keratopathy worse?
In the morning
What is thygeson's SPK?
Grey-white elevated corneal epithelial opacities
Found in 20s-30s
When is thermal/UV keratopathy worse?
6-12 hrs after exposure
What are classic signs of keratoconus?
Where on the cornea is thinnest in keratoconus?
Where on the cornea is thinnest in pellucid marginal degeneration?
What congenital inheritance is keratoglobus?
What conditions are associated with keratoglobus?
Leber's congenital amaurosis
What is Reis-buckler dystrophy?
Abnormal development of bowman's that causes opacities
What stromal corneal dystrophy is least common but most severe?
What stromal corneal dystrophy is most common?
What causes irregular grey-white spots in macular dystrophy?
What causes the snowflake granules in granular dystrophy?
What causes the lattice-like lines in lattice dystrophy?
What stromal corneal dystrophy is autosomal recessive?
What is Schnyder's dystrophy?
Yellow-white stromal crystals in hazy cornea, from hyperlipidemia
What are the beaten bronze bodies named found in Fuchs?
Hassal-henle bodies in descemet's
What is posterior polymorphous dystrophy?
Bilateral asymmetric subtle patches of vesicles
What conditions are associated with megalocornea?
What type of ametropia is found in megalocornea?
High myopia and astig
What type of ametropia is found in microcornea?
What other diseases are associated with cornea plana?
What are Haab's striae?
Horizontal cracks in descemet's from congenital glaucoma
What is posterior embryotoxon?
Anterior displaced schwalbe's line
What is axenfeld's anomaly?
Prominent iris strands + PE
What is Rieger's anomaly?
What is Rieger's syndrome?
Reiger's anomaly+mental retardation, dental, facial and skeletal abnormalities
What is Peter's anomaly?
Central corneal opacity with iris adhesions
What fungal keratitis are filamentous?
What fungal keratitis is not filamentous?
Which herpes type has dendrites?
Which corneal diseases have pseudodendrites?
What culture is used for herpes virus?
What is the most common form of Mooren's ulcer?
Found in older patients
What is the most severe form of Mooren's ulcer?
Young Nigerian males
What systemic condition is associated with Mooren's ulcer?
What demographic is typical in Terrien's marginal degeneration:
What is terrien's marginal degeneration?
Bilateral slowly progressing periph thinning with otherwise healthy eye
What demographic is salzmann's nodular degeneration found?
What is limbal girdle of vogt?
Bilateral chalk-like linear opacities nasal limbus
What layer is affected by band keratopathy?
What is crocodile shagreen?
Bilateral polygonal stromal opacities that are asymptomatic
What is corneal farinata
Asymptomatic bilateral flour dust in deep stroma
What are the dimensions of the avg cornea?
12mm x 11mm
What is the radius of curvature of the anterior surface of the cornea?
What is the radius of curvature of the posterior surface?
What is the avg central corneal thickness?
What is the avg periph corneal thickness?
What is the total turnover time for cornea epithelium?
What layer of the cornea forms scars?
What keeps the fibrils in the stroma evenly-spaced?
Negative charge of glycosaminoglycans
What layer is copper deposited in wilson's disease?
cornea, NBEO, Optometry