H40.232 Intermittent angle-closure glaucoma, left eye

Name of the Condition

• Intermittent Angle-Closure Glaucoma, Left Eye

Summary

Intermittent angle-closure glaucoma, left eye, is a form of glaucoma marked by periodic, temporary closure of the left eye's drainage angle, leading to episodic increases in intraocular pressure. These episodes may resolve spontaneously or require intervention, and the condition carries a risk of progressive optic nerve damage over time if not managed. The term "intermittent" reflects the recurring nature of the angle closure, while "left eye" specifies the laterality of the condition.

Causes

The condition stems from anatomical factors that predispose the left eye's drainage angle to intermittent blockage, such as a narrow angle or a thickened lens. Episodes may be triggered by factors like pupil dilation (e.g., in low light or with certain medications), which can temporarily worsen the angle closure. Underlying structural abnormalities in the left eye's anterior segment may also contribute.

Risk Factors

• Anatomically narrow drainage angles in the left eye.
• Farsightedness (hyperopia).
• Age over 40.
• Family history of glaucoma.
• Asian or Inuit descent.
• Pupil-dilating medications or conditions.

Symptoms

• Episodic eye pain or discomfort in the left eye.
• Blurred vision during attacks.
• Halos around lights.
• Headaches.
• Nausea (in acute episodes).
• Gradual peripheral vision loss over time.

Diagnosis

Diagnosis requires a comprehensive eye exam, including tonometry to measure intraocular pressure, gonioscopy to assess the drainage angle, and optical coherence tomography to evaluate optic nerve health. The left eye is specifically examined to confirm laterality.

Treatment Options

Treatment may include medications to lower intraocular pressure, laser therapy (e.g., iridotomy) to improve drainage, or surgical interventions. Management focuses on preventing acute attacks and preserving vision in the left eye.

Prognosis and Follow-Up

With appropriate management, prognosis is generally favorable, but regular follow-up is essential to monitor intraocular pressure and optic nerve status. Untreated episodes may lead to permanent vision loss in the left eye.

Complications

Potential complications include acute angle-closure glaucoma, permanent optic nerve damage, and irreversible vision loss in the left eye if episodes are frequent or severe.

Lifestyle & Prevention

• Avoid triggers like low-light environments or medications that dilate the pupil without consulting a provider.
• Maintain regular eye exams to monitor the left eye's drainage angle.
• Follow prescribed treatments consistently to reduce attack frequency.

When to Seek Professional Help

Seek immediate care if experiencing sudden eye pain, severe headache, blurred vision, or halos around lights in the left eye, as these may indicate an acute attack requiring urgent intervention.

Tips for Medical Coders

Use H40.232 for intermittent angle-closure glaucoma affecting the left eye. Ensure documentation specifies laterality and confirms the intermittent nature of the condition. Differentiate from acute or chronic forms based on clinical presentation and episode frequency.