H18.543 Lattice corneal dystrophy, bilateral

Name of the Condition

• Lattice corneal dystrophy, bilateral

Summary

Lattice corneal dystrophy, bilateral, is a genetic disorder affecting both corneas. 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 in both eyes.
• Sensitivity to light (photophobia) in both eyes.
• Recurrent corneal erosions in both eyes.
• Visible lattice-like lines or opacities in both corneas.
• Glare or halos around lights when viewing with either eye.

Diagnosis

Diagnosis requires a comprehensive eye examination by an ophthalmologist, focusing on both eyes. 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

Treatment may include lubricating eye drops to manage symptoms, bandage contact lenses for recurrent erosions, and surgical interventions such as corneal transplantation in advanced cases. Phototherapeutic keratectomy (PTK) may be considered for superficial opacities.

Prognosis and Follow-Up

Prognosis varies; vision may gradually decline over time. Regular follow-up with an ophthalmologist is essential to monitor disease progression and adjust treatment as needed. Early intervention can help preserve vision.

Complications

Potential complications include severe vision loss, corneal scarring, and increased risk of corneal infections. Recurrent erosions may lead to discomfort and further vision impairment.

Lifestyle & Prevention

While the condition is genetic, protecting the eyes from injury and using sunglasses to reduce photophobia may help manage symptoms. Genetic counseling is recommended for affected individuals and their families.

When to Seek Professional Help

Seek immediate medical attention if you experience sudden vision changes, severe eye pain, or persistent sensitivity to light, as these may indicate complications or other eye conditions.

Tips for Medical Coders

Document the bilateral nature of the condition clearly in the medical record. Ensure the diagnosis is supported by clinical findings and, if available, genetic testing results. The code H18.543 specifically denotes bilateral involvement, so avoid using unilateral codes unless only one eye is affected.