H40.211 Acute angle-closure glaucoma, right eye

Name of the Condition

• Acute Angle-Closure Glaucoma, Right Eye

Summary

Acute angle-closure glaucoma, right eye, is a sudden, severe form of glaucoma characterized by rapid closure of the right eye's drainage angle, leading to a rapid increase in intraocular pressure. This condition can cause significant pain, vision loss, and optic nerve damage if not treated promptly. It is a medical emergency requiring immediate intervention to prevent permanent vision impairment in the right eye.

Causes

The primary cause is a sudden blockage of the right eye's drainage angle, often due to anatomical factors such as a thickened or forward-positioned lens. This blockage prevents aqueous humor from draining, causing intraocular pressure to rise rapidly. Contributing factors may include pupil dilation, inflammation, or structural abnormalities in the eye's anterior segment.

Risk Factors

• Anatomically narrow drainage angles in the right eye.
• Farsightedness (hyperopia).
• Age over 40.
• Family history of glaucoma.
• Asian or Inuit descent.
• Certain medications that dilate the pupil.
• Previous episodes of angle closure.

Symptoms

• Severe eye pain or headache in the right eye.
• Blurred vision in the right eye.
• Halos around lights in the right eye.
• Nausea or vomiting.
• Redness in the right eye.
• Sudden loss of vision in the right eye.

Diagnosis

Diagnosis involves a comprehensive eye examination of the right eye, including tonometry to measure intraocular pressure, gonioscopy to assess the drainage angle, and optical coherence tomography to evaluate the anterior segment. Additional tests may include visual field testing and optic nerve imaging to assess damage.

Treatment Options

Treatment focuses on rapidly lowering intraocular pressure in the right eye, typically with medications such as topical or systemic agents to reduce fluid production or increase drainage. Laser iridotomy or iridectomy may be performed to create a new drainage pathway. In severe cases, surgical intervention may be necessary.

Prognosis and Follow-Up

With prompt treatment, vision loss in the right eye may be prevented or minimized. Long-term follow-up is essential to monitor intraocular pressure and optic nerve health. Patients may require ongoing medication or additional procedures to prevent recurrence.

Complications

Untreated acute angle-closure glaucoma in the right eye can lead to permanent vision loss, optic nerve damage, or blindness. Recurrent episodes may increase the risk of chronic angle-closure glaucoma.

Lifestyle & Prevention

• Avoid medications that dilate the pupil without consulting a healthcare provider.
• Regular eye examinations, especially for those with risk factors.
• Manage underlying conditions like farsightedness or anatomical predispositions.

When to Seek Professional Help

Seek immediate medical attention if experiencing severe eye pain, blurred vision, halos around lights, or sudden vision loss in the right eye. These symptoms require urgent evaluation to prevent permanent damage.

Tips for Medical Coders

Document the laterality (right eye) and acute nature of the condition. Ensure clinical documentation supports the diagnosis and treatment provided. Code H40.211 is specific to acute angle-closure glaucoma in the right eye; verify laterality and acuity in the medical record.