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Managing glaucoma in a nanophthalmic eye or a microphthalmic one is one of the most complex challenges in ophthalmology. It is not routine surgery; it is a long-distance race against blindness, especially in young patients. This SamurEye episode takes a deep dive into the radical but effective strategy we used in an extreme case of acute angle closure in an 18-year-old patient with an axial length of only 16.75 mm.
The Crisis and the Triple Approach
The patient was referred in crisis, with an IOP of 40 mmHg that did not respond to medical treatment. The characteristics of such a small eye demand going beyond standard procedures. This is where the combined single-session strategy comes in, proving superior to multiple re-operations during a crisis.
The Definitive Approach:
- Lensectomy: Removal of the crystalline lens, a key component that takes up space and pushes the iris diaphragm forward.
- Posterior vitrectomy: Crucial for removing the posterior vitreous component that exerts pressure and promotes angle closure. This creates vital space in the anterior chamber.
- Transscleral cyclophotocoagulation (CPC): Controlled destruction of part of the ciliary body. This maneuver reduces aqueous humor production, achieving immediate pressure control.
Clinical Lessons and Challenges of the Nanophthalmic Eye
The main challenge in these cases is not only controlling pressure but avoiding damage to already compromised eye tissue.
- Mannitol as a Critical Ally: It was confirmed that giving preoperative mannitol (limited to 1 hour) is essential. It dehydrates the lens and makes surgery easier without causing complications in the capsulorhexis.
- Goodbye to Serial Aggression: Comparing the patient's two eyes, the second eye, treated with the single-session triple strategy and reduced CPC parameters, had a cleaner recovery. The first eye, operated on during the crisis and re-operated, developed areas of scleromalacia due to active inflammation.
- A War of Attrition, Not One-Off Efforts: The ultimate goal is preservation. By choosing CPC and vitrectomy, we avoided touching the young patient's conjunctiva and sclera. This leaves the "battlefield" intact for more aggressive filtering procedures (valves or trabeculectomies) the patient may need in the decades ahead.
Takeaways for Your Practice
Managing nanophthalmic glaucoma demands a proactive approach. Being "aggressive" in a single surgical session to create space and reduce aqueous production is often the most conservative long-term strategy. The patient's IOP stabilized at 15 mmHg without relying on implanted devices, keeping all treatment options open for the marathon of managing juvenile glaucoma.
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