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What Is Calcific Keratopathy?

Calcific keratopathy is a corneal degeneration in which calcium salts deposit in the superficial cornea, often in Bowman's layer and the anterior stroma. The deposits appear as whitish, chalky, or plaque like opacities that can form bands or patches. Calcific change can occur in otherwise normal corneas or in eyes with chronic inflammation or long standing disease. Systemic mineral imbalance sometimes contributes. When deposits involve the visual axis, they can cause glare, discomfort, and blurred vision.

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What Is Calcific Keratopathy?

Calcific keratopathy is a corneal degeneration in which calcium salts deposit in the superficial cornea, often in Bowman's layer and the anterior stroma. The deposits appear as whitish, chalky, or plaque like opacities that can form bands or patches. Calcific change can occur in otherwise normal corneas or in eyes with chronic inflammation or long standing disease. Systemic mineral imbalance sometimes contributes. When deposits involve the visual axis, they can cause glare, discomfort, and blurred vision.

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Causes and Associations of Calcific Keratopathy

Calcific keratopathy can follow chronic uveitis, long standing glaucoma, or eyes that have become phthisical. Silicone oil fill, long term intraocular inflammation, and certain topical medicines can favor calcium deposition. Systemic disorders such as hyperparathyroidism, kidney failure, and other causes of high serum calcium or phosphate are also linked. Sometimes no clear systemic cause is found and the process is considered idiopathic. Careful review of ocular and medical history helps uncover contributors.

Symptoms and Clinical Features

People with mild calcific keratopathy may have no symptoms if deposits stay outside the visual axis. With central involvement, patients report glare, halos, and a hazy film over vision. On slit lamp exam, plaques or bands of calcium are seen in the superficial cornea, often with a clear interval near the limbus. The surface can look rough, and overlying epithelium sometimes breaks down, causing pain. The pattern can mimic band or ribbon keratopathy, and terms are sometimes used together.

How Is Calcific Keratopathy Diagnosed?

Diagnosis is made on clinical appearance and history. The ophthalmologist inspects the location, depth, and configuration of opacities with the slit lamp. Fluorescein staining reveals any epithelial defects over calcified areas. Blood tests for calcium, phosphate, and kidney function help detect systemic causes. If corneal tissue is removed, histology shows basophilic calcium deposits that stain with special techniques. Other corneal dystrophies and degenerations are considered in the differential.

How Is Calcific Keratopathy Managed?

Treatment depends on symptoms and severity. Lubricating drops and ointments improve comfort in mild disease. When central deposits disturb sight or cause recurrent epithelial breakdown, chelation with EDTA after superficial keratectomy is often used to remove calcium. The surface then re epithelializes over several days under bandage lens protection. Long term, controlling ocular inflammation and systemic mineral disorders helps reduce recurrence and protect corneal clarity.

FAQs About Calcific Keratopathy

Is calcific keratopathy the same as band keratopathy?

The terms overlap, because both involve calcium in the superficial cornea, often in a band like pattern. Band keratopathy usually refers to a classic interpalpebral band, while calcific keratopathy is a broader label that includes other patterns.

Can diet changes cure calcific keratopathy?

Dietary changes alone rarely clear existing deposits, although good control of calcium and phosphate is important in people with kidney or parathyroid disease. Established plaques usually need chelation or surgery when vision is affected.

Does calcific keratopathy always come back after removal?

Recurrence can happen, especially if chronic inflammation or mineral imbalance continues, but many patients enjoy long periods of clearer vision after one procedure. Regular follow up helps detect early recurrence.

Will eye drops dissolve the calcium in calcific keratopathy?

Standard lubricants ease symptoms but do not dissolve calcific plaques. EDTA chelation performed in a clinic or operating room is the usual method for active removal when needed.