Question
A. BAL
B. Chlorhexidine
C. EDTA
D. Propamidine
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Correct Answer » C Explanation |
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Ans:C. EDTA.
Band Shaped keratopathy is shown in the image.
Band shape keratopathy
It is essentially a degenerative change associated with deposition of calcium salts in Bowman’s membrane, most superficial part of stroma and in deeper layers of epithelium.
Etiology
Ocular diseases. Band keratopathy is seen in association with: chronic uveitis in adults, children with Still’s disease, phthisis bulbi, chronic glaucoma, chronic keratitis and ocular trauma.
Age related BSK is common and affects otherwise healthy cornea.
Metabolic conditions rarely associated with BSK include hypercalcaemia and chronic renal failure.
Clinical features.
It typically presents as a bandshaped opacity in the interpalpebral zone with a clear interval between the ends of the band and the limbus.
Treatment.
- Chelation, i.e., chemical removal of deposited calcium salts is an effective treatment. First of all corneal epithelium is scraped under local anaesthesia. Then 0.01 molar solution of EDTA (chelating agent) is applied to the denuded cornea with the help of a cotton swab for about 10 minutes. This removes most of the deposited calcium. Pad and bandage is then applied for 2- 3 days to allow the epithelium to regenerate.
- Phototherapeutic keratectomy (PTK) with excimer laser is very effective in clearing the cornea.
- Keratoplasty may be performed when the band keratopathy is obscuring useful vision.
