H40.241

Clinical Causes: Persistent blockage of aqueous humor drainage due to anatomical narrow angles in the eye Bone structure or iris configuration that predisposes to angle closure Previous episodes of angle-closure glaucoma causing lasting damage Incomplete response to initial glaucoma treatment or laser procedures Age-related changes leading to further narrowing of drainage angles

Key Symptoms: Gradual loss of peripheral vision Seeing halos around lights, especially at night Episodes of eye pain or discomfort Headache or nausea associated with increased eye pressure No clear symptoms in the early stages, making regular eye examinations crucial

Diagnosis Path: Diagnosis involves comprehensive eye examination including intraocular pressure measurement, slit-lamp examination, gonioscopy to assess the anterior chamber angle, and optic nerve assessment. Visual field testing may be performed to evaluate peripheral vision loss. Imaging techniques like anterior segment optical coherence tomography (AS-OCT) can also assist in detailed analysis of the eye’s drainage structures. The residual nature of this stage indicates that initial glaucoma episodes have caused lasting optic nerve damage or angle closure, which is identifiable through these diagnostic measures.

Treatment Protocols: Management strategies aim to control intraocular pressure (IOP) and prevent further optic nerve damage. Typical approaches include: - Medications such as eye drops that lower IOP (e.g., prostaglandin analogs, beta-blockers) - Laser procedures like trabeculectomy or laser iridotomy to improve drainage - Regular monitoring to assess IOP levels and optic nerve health - Lifestyle adjustments to reduce risk factors and prevent pressure spikes In residual stages, treatment emphasizes protecting remaining vision and managing symptoms, since some damage is irreversible. Patients are often advised to attend routine checkups for early detection of any progression or complications.