Calcium deposits as a horizontal band and begins near the corneal periphery at 3 and 9 'o' clock positions.
As the deposits move centrally, the band has clear void circles where Bowman’s layer is penetrated by corneal nerve endings.
Location: Epithelial basement membrane, basal epithelium, Bowman's layer & Anterior stroma.
Causes: elevated serum calcium or phosphate in systemic diseases, including sarcoidosis, hyperparathyroidism, vitamin D toxicity, metastatic neoplasm to bone, and chronic renal failure with secondary hyperparathyroidism, Chronic uveitis.
Treatment:
- Removing epithelium over the deposits, applying 0.05mol/L disodium EDTA acid to chelate the calcium and dissolve it.
- Excimer laser PTK.
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Image from Rajan Eye Care Hospital #ophthalmology#ophthal#doctor#health#medical#vision#education#optometry#medicalstudent#optometrist#medicine#eye#ophtho#ophthalmologist#ophthalmo#med#medicaleducation#ophthalmologyresident#ophthalmologyresidency#cornea#bandshapedkeratopathy#calcium#epithelium#bowmans#bsk#stroma#apaoyo
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