H18.54 Lattice corneal dystrophy

Name of the Condition

• Lattice corneal dystrophy

Summary

Lattice corneal dystrophy is a genetic disorder that affects the cornea, the clear front surface of the eye. It is characterized by the deposition of abnormal protein fibers (amyloid) in the corneal stroma, leading to progressive clouding and vision impairment. The condition typically presents in early adulthood and may worsen over time.

Causes

The primary cause is genetic mutations, most commonly in the TGFBI gene, which encodes a protein involved in corneal structure. These mutations lead to the accumulation of amyloid deposits in the cornea. The condition is usually inherited in an autosomal dominant pattern.

Risk Factors

• Family history of lattice corneal dystrophy.
• Genetic predisposition due to inherited mutations in the TGFBI gene.

Symptoms

• Blurred or reduced vision.
• Sensitivity to light (photophobia).
• Recurrent corneal erosions.
• Visible lattice-like lines or opacities in the cornea.
• Glare or halos around lights.

Diagnosis

Diagnosis requires a comprehensive eye examination by an ophthalmologist. Key assessments include slit-lamp examination to identify characteristic lattice-like opacities, corneal topography or tomography to evaluate structural changes, and genetic testing to confirm mutations in the TGFBI gene. Clinical correlation with family history is often helpful.

Treatment Options

• Lubricating eye drops to manage symptoms and prevent erosions.
• Therapeutic contact lenses to improve vision and protect the cornea.
• Corneal transplantation (penetrating keratoplasty) in advanced cases to restore clarity.
• Antiviral or antibiotic drops if erosions become infected.

Prognosis and Follow-Up

Prognosis varies depending on the severity and progression of the dystrophy. Early-stage disease may be managed with conservative treatments, but vision often deteriorates over time. Regular follow-up with an ophthalmologist is essential to monitor changes and adjust treatment. Recurrence of deposits may occur after transplantation.

Complications

• Progressive vision loss due to corneal clouding.
• Recurrent corneal erosions, which can cause pain and discomfort.
• Increased risk of corneal infections.
• Potential need for repeated surgical interventions.

Lifestyle & Prevention

• Avoid eye trauma or injury.
• Use protective eyewear during activities that pose a risk to the eyes.
• Maintain good eye hygiene to reduce infection risk.
• Follow up regularly with an ophthalmologist to monitor progression.

When to Seek Professional Help

Seek immediate medical attention if you experience sudden vision changes, severe eye pain, or signs of corneal erosion (e.g., redness, tearing, or sensitivity). Regular check-ups are recommended for those with a family history of the condition.

Tips for Medical Coders

Document the presence of lattice-like corneal opacities, genetic testing results (if available), and any associated complications. Ensure the diagnosis aligns with clinical findings and family history. Use this code for confirmed cases of lattice corneal dystrophy; avoid using it for unspecified or other corneal dystrophies.