Question
True statement about given condition of eye except:
A. Arise from any part of conjunctiva
B. Can cause Astigmatism
C. Surgery is treatment of choice
D. UV exposure is risk factor
Show Answer
|
Correct Answer » A Explanation |
 |
Answer. A. Arise from any part of conjunctiva
Given condition is Pterygium
- Pterygium is a non- cancerous (non-neoplastic) growth of conjunctiva.
- Characterized by a wing-shaped fold of conjunctiva upon the cornea from either side within the interpalpebral fissure.
- Pterygium is always situated in the palpebral aperture.
- Pathologically Pterygium is a degenerative & hyperplastic condition of conjunctiva.
- The subconjunctival tissue undergoes elastotic degeneration & proliferates as vascularised granulation tissue under the epithelium, which ultimately encroaches the cornea.
- The corneal epithelium, Bowman’s layer & stroma are destroyed.
Etiology & Clinical features
- More common in people with excess outdoor exposure to sunlight (UV rays) dry, heat, high wind & abundance of dust.
- Clinically, presents as a triangular fold of conjunctiva encroaching the cornea in the area of palpebral aperture, usually on the nasal side.
- Other findings are stocker’s line (deposition of iron).
- Pterygium is an asymptomatic condition in the early stages, except for cosmetic intolerance.
- Visual disturbance or corneal astigmatism may occur.
- Visual disturbances are due to encroachment of pterygium on pupillary area or corneal astigmatism.
- Occasionally diplopia may occur due to limitation of ocular movements.
Treatment
- Asymptomatic pterygium which is not progressive is best left alone.
- Surgical excision is the only satisfactory treatment.
