Corneal degeneration refers to conditions where the normal cells of the cornea undergo degenerative changes due to age or pathology. There are several types of corneal degenerations that can be classified based on location (axial or peripheral) and etiology (age-related or pathological). Common age-related peripheral degenerations seen in elderly individuals include arcus senilis, Vogt's white limbal girdle, and Hassall-Henle bodies. Arcus senilis appears as a grey or white ring around the peripheral cornea and is non-pathological. Vogt's white limbal girdle is similar but can occur in younger people and may be associated with hypercholesterolemia. Hassall-
2. • Degenerative changes in the cornea.
• Definition: Corneal degeneration refers to the
conditions in which normal cells undergo
some degenerative changes under the
influence of age or some pathological
condition.
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3. As being:
• Non - Hereditary and Non - Familial
• Usually Unilateral
• Mostly Peripheral
• More frequently seen
• Vascularity and Inflammation is seen.
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5. • Depending upon Location
I. Axial Corneal Degenerations
a) Fatty Degenerations
b) Hyaline Degenerations
c) Amyloidosis
d) Calcific Degenerations (Band
Keratopathy)
e) Salzmann’s Nodular Degeneration
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6. II. Peripheral Degenerations
a) Arcus Senilis
b) Vogt’s White Limbal Girdle
c) Hassall – Henle Bodies
d) Terriens’s Marginal Degeneration
e) Mooren’s Ulcer
f) Pellucid Marginal Degeneration
g) Furrow Degeneration (Senile
Marginal Degeneration)
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7. • Depending upon Etiology
I.Age Related Degenerations
a) Arcus Senilis
b) Vogts White Limbal Girdle
c) Hassal - Henle Bodies
d) Mosaic Degenerations
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8. II. Pathological Degenerations:
a) Fatty Degeneration
b) Amyloidosis
c) Calcific Degenerations
d) Salzmann’s Nodular Degeneration
e) Terrien’s Marginal Degeneration
f) Mooren’s Ulcer
g) Pellucid Marginal Degeneration
h) Furrow Degenerations
i) Spheroidal Degeneration
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10. • It is the annular lipid
infiltrations of the corneal
periphery seen in the elderly.
• Age – related degeneration
occurring bilaterally in 60% of
people aged 40 to 60 years.
• And almost all individuals
aged over 80 years.
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11. • Commences as a crescentric grey or white arc
in the superior and inferior quadrant and
progresses to form a ring around the cornea,
• 1mm wide ring
• Lucid interval of Vogt’s – the clear zone which
separates the ring of opacity from the limbus.
• Peripheral border is sharp and inner border is
diffuse.
• Rarely double ring of Arcus is seen.
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13. • It is not of importance, as it does not decrease
vision or the vitality of the cornea.
• Unrelated to metabolic conditions such as
hypercholesterolemia.
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14. • Similar to Arcus Senilis but
occurs in individuals aged less
than 40 years.
• Rare condition
• Associated with
Hypercholesterolemia
• Diagnostic feature: Presence of
a line of clear cornea between
opacity and limbus.
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15. • Age related which appears as a bilateral
chalky white opacities in the inter -
palpebral area both nasally and temporally.
• Opacity in the Bowman's Membrane.
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18. Hassal - Henle Bodies
• Drop shaped excrescences of hyaline material
projecting into the anterior chamber around
the corneal periphery
• Arise from Descemet’s membrane
• Commonest senile change.
• In pathological changes, they become larger
and invade the central area and the conditions
is called ‘Corneal Guttata’.
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