Question
The most common cause of visual disturbance in Pterygium is?
| A. |
Astigmatism
|
| B. |
Myopia
|
| C. |
Corneal perforation
|
| D. |
Retinal detachment
|
Show Answer
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|
Correct Answer � A
Explanation
|
|
Pterygium:
- It is an elastotic degeneration of the conjunctiva.
- A degenerated fold of conjunctiva grows on the surface of the cornea to involve the superficial corneal layers up to the stroma.
- It is associated with UV rays exposure.
- More common on the nasal side.
- A pterygium has 3 parts: Head, Neck and body.
- Close to the head of the pterygium is a pigmented line due to iron deposition called as Stocker’s line.
Pterygium may lead to:
- Visual disturbance when it encroaches the pupillary axis.
- Astigmatism: Usually, with the rule.
- Diplopia due to restriction of ocular movements
- Disturbance of tear film
- Cosmetic blemish
Treatment:
- Maybe left alone if asymptomatic
- Excision with bare sclera: Simple excision is associated with a high level of recurrence
- Excision with the application of “Mitomycin C” to the bed of pterygium
- Excision with conjunctival autograft
- Excision with amniotic membrane graft.
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