dry eye

1. CONJUNCTIVA
L XEROSIS
BABY KUMARI

2. DEFINITION
Dry and lusterless
condition of
conjunctiva due to
deficiency of mucin

3. TYPES
Parechymatous Epithelial

4. PARENCHYMATOUS XEROSIS
Cicatricial degeneration of conjunctival
epithelium and glands.

5. Causes
1. Destructive interstitial conjunctivitis seen in ……
Trachoma
Diphtheric membranous conjunctivitis
Steven johnsons syndrome
Pemphigoid conjunctivitis
Thermal , chemical and radiational burns of
conjunctiva.

6. 2. Exposure of conjunctiva to air seen in
Marked degree of proptosis
Facial palsy
Ectropion
Lack of blinking of conjunctiva(coma)
Lagopthalmos due to symblepharon

7. PATHOLOGY
• Chief changes are in epithelium:
 Ceases to secrete mucus and becomes
epidermoid like that of skin with granular
and horny layers .
• Certain amount of vicarious activity in
meibomian glands which cover the dry surface
with there fatty secretion .

9. EPITHELIAL XEROSIS
• Associated with general disease like vitamin A
deficiency in diet.
• Childrens
• Accompanied by night blindness (nactalopia) .
• Summer

10. SIGNS
• Small, triangular , dry white patches outer
and inner side of cornea.
• Covered by dried foam ( Bitot spots ).
• Due to gas production by Corynebacterium
xerosis in the horny epithelium.

11. BITOT SPOTS

12. TREATMENT
• Local treatment :-
1. Artifical tears ( 0.7% methylcellulose or 0.3%
hypromellose or polyvinyl alcohol) .
Frequency varies from 1 hrs to 6 hrs.
• Dark glasses should be worn .
• Administration of vitamin A.

13. REFERENCES
•Parson 21th edition
•A K Khurana 6th edition

14. THANK YOU