What condition presents with a colored halo around lights, marked photophobia, and ocular pain?

Acute Angle-Closure Crisis (AACC)

The triad of rainbow halos around lights, photophobia, and eye pain is highly characteristic of acute angle-closure crisis (AACC), an ophthalmic emergency requiring immediate treatment to prevent permanent vision loss. 1

Clinical Presentation

The symptoms you describe represent the classic presentation of AACC, which occurs when the anterior chamber angle becomes suddenly obstructed, causing rapid IOP elevation to dangerously high levels. 1

Key clinical features include:

• Rainbow-colored halos around lights - caused by pressure-induced corneal edema that creates a prismatic effect 1
• Severe eye pain - from the acutely elevated intraocular pressure 1
• Photophobia - light sensitivity accompanying the acute episode 1
• Blurred vision - secondary to corneal edema 1
• Mid-dilated, poorly reactive pupil - characteristic finding on examination 1
• Conjunctival and episcleral vascular congestion (red eye) 1
• Headache, nausea, and vomiting - systemic symptoms from severe IOP elevation 1

Pathophysiology

AACC occurs when pupillary block causes posterior chamber pressure to exceed anterior chamber pressure, leading to anterior iris bowing that suddenly obstructs the trabecular meshwork. 1 This results in IOP that can reach 40-50 mmHg or higher. 1

Risk Factors to Consider

Common predisposing factors include: 1

• Hyperopia (farsightedness) 1
• Asian descent 1
• Older age (>50 years) 1
• Female gender 1
• Short axial length 1
• Shallow anterior chamber 1
• Medications with anticholinergic or adrenergic effects (decongestants, antihistamines, antidepressants) 1

Immediate Management Required

This is an ophthalmic emergency requiring urgent treatment to prevent permanent blindness. 1 Without treatment, AACC causes rapid optic nerve damage - studies show 18% of untreated eyes become blind, with 50% of blindness attributable to glaucoma. 1

Immediate treatment protocol: 1

• Medical therapy to lower IOP acutely:

  • Aqueous suppressants (topical beta-blockers, alpha-agonists, carbonic anhydrase inhibitors) 1
  • Parasympathomimetics (pilocarpine) to constrict the pupil 1
  • Osmotic agents (mannitol or oral glycerol) if necessary 1

• Definitive treatment with laser peripheral iridotomy (LPI) after IOP control 1

• Prophylactic laser iridotomy in the fellow eye - the contralateral eye has extremely high risk of AACC 1

Critical Pitfall

The fellow eye requires prophylactic treatment. Untreated fellow phakic eyes are at markedly increased risk for developing acute angle closure. 1 Failure to address the contralateral eye is a common management error that can result in bilateral vision loss.

Alternative Consideration

While AACC is by far the most likely diagnosis given this symptom triad, anterior uveitis with secondary glaucoma can occasionally present with similar symptoms (halos, photophobia, pain with elevated IOP), though it typically shows anterior chamber inflammation with keratic precipitates on slit-lamp examination rather than the mid-dilated pupil and corneal edema of AACC. 2