H35.313 Nonexudative age-related macular degeneration, bilateral

Name of the Condition

• Nonexudative Age-Related Macular Degeneration, Bilateral (H35.313)

Summary

Nonexudative age-related macular degeneration (AMD) is a chronic eye condition affecting the macula, the central part of the retina responsible for sharp central vision. It involves gradual macular degeneration without fluid leakage or bleeding, leading to bilateral vision impairment. This form is commonly referred to as "dry AMD."

Causes

The exact cause is unknown, but it involves the degeneration of retinal cells and the accumulation of drusen (yellow deposits) under the retina. Oxidative stress and impaired cellular debris removal are suspected contributors.

Risk Factors

• Age (most common in individuals over 60)
• Family history of AMD
• Smoking
• High blood pressure and cholesterol
• Obesity
• Prolonged sunlight exposure
• Poor diet low in antioxidants

Symptoms

• Blurred or reduced central vision
• Difficulty recognizing faces
• Need for brighter light when reading
• Gradual difficulty adapting to low light levels

Diagnosis

Diagnosis requires a comprehensive eye examination, including dilation to assess the macula. Optical coherence tomography (OCT) visualizes retinal layers, and an Amsler grid test detects vision distortions. Fundus photography may document macular changes.

Treatment Options

• No cure exists, but progression can be slowed.
• Nutritional supplements (e.g., antioxidants, zinc)
• Low-vision aids for daily tasks

Prognosis and Follow-Up

Prognosis varies; vision loss is gradual but may stabilize. Regular follow-ups with an ophthalmologist are essential to monitor for progression or conversion to exudative AMD.

Complications

• Progressive central vision loss
• Increased risk of developing exudative AMD
• Difficulty with daily activities (e.g., reading, driving)

Lifestyle & Prevention

• Quit smoking
• Maintain a diet rich in leafy greens and antioxidants
• Protect eyes from UV light with sunglasses
• Manage blood pressure and cholesterol
• Exercise regularly

When to Seek Professional Help

Seek care if you experience sudden vision changes, increased blurriness, or difficulty with central vision, as these may indicate progression or complications.

Tips for Medical Coders

Document bilateral involvement and nonexudative nature. Ensure clinical notes specify the absence of exudative features (e.g., fluid, bleeding) to support accurate coding.