H40.2213 Chronic angle-closure glaucoma, right eye, severe stage

Name of the Condition

• Chronic Angle-Closure Glaucoma, Right Eye, Severe Stage

Summary

Chronic angle-closure glaucoma is an eye condition where the drainage angle of the eye becomes partially blocked over time, leading to increased intraocular pressure and potential optic nerve damage. In this case, it affects the right eye and is classified as severe stage, meaning there are significant symptoms and measurable vision loss, with a higher risk of irreversible damage if untreated.

Causes

The condition typically arises from anatomical factors, such as a naturally narrow drainage angle or age-related changes like lens thickening, which reduce the space between the iris and cornea. It may also develop as a complication of other eye conditions or trauma.

Risk Factors

• Older age (typically over 40).
• Family history of glaucoma.
• Asian or Inuit descent.
• Farsightedness (hyperopia).
• Certain medications that dilate the pupil.

Symptoms

• Blurred vision.
• Halos around lights.
• Moderate to severe eye pain or headaches.
• Significant loss of peripheral vision.
• In severe stages, tunnel vision may occur.

Diagnosis

Diagnosis involves a comprehensive eye exam, including tonometry to measure intraocular pressure, gonioscopy to assess the drainage angle, and optical coherence tomography (OCT) to evaluate optic nerve health. Visual field tests may also be used to detect advanced peripheral vision loss.

Treatment Options

Treatment may include medications to lower intraocular pressure, laser therapy to improve drainage, or surgery to create a new drainage pathway. Severe cases may require more aggressive interventions to prevent further vision loss.

Prognosis and Follow-Up

Prognosis depends on the extent of optic nerve damage and adherence to treatment. Regular follow-up appointments are essential to monitor intraocular pressure and vision changes, with adjustments to therapy as needed.

Complications

Untreated or poorly managed severe chronic angle-closure glaucoma can lead to permanent vision loss, including blindness. Other complications may include optic nerve atrophy and reduced quality of life due to visual impairment.

Lifestyle & Prevention

• Avoid medications that dilate the pupil without consulting a healthcare provider.
• Maintain regular eye exams, especially if risk factors are present.
• Manage other health conditions that may affect eye pressure.

When to Seek Professional Help

Seek immediate medical attention for sudden severe eye pain, vision changes, or halos around lights, as these may indicate acute angle closure or worsening glaucoma.

Tips for Medical Coders

Document the laterality (right eye) and severity (severe stage) clearly in the medical record. Ensure the diagnosis aligns with clinical findings, such as elevated intraocular pressure, optic nerve damage, and visual field loss. Use this code only when the condition is confirmed as chronic and severe.