Treatment Options and Surgical Considerations

Treating glaucoma with elevated episcleral venous pressure (EVP) requires individualized care. Because the problem isn’t just that the eye’s drain is “clogged”—but that the “pipes” outside the eye are already under high pressure—traditional treatments that work for most glaucoma patients may face greater resistance ^[1][2].

The Treatment Decision Tree

The first step in your care is always to determine if there is a reversible cause for the high venous pressure.

1. Address the Underlying Cause: If a vascular issue (like a carotid-cavernous fistula) or a thyroid problem is found, treating that condition is often a priority. In many cases, fixing the vascular “leak” or the orbital blockage will cause the eye pressure to improve naturally ^[3][4].
2. Medical Management: If no reversible cause is found, or if the pressure remains high after treatment, your doctor will tailor a treatment plan to lower your intraocular pressure ^[2].
3. Surgical Intervention: If drops fail to protect your optic nerve, specialized surgery may become necessary ^[5].

Important Safety Note: Never stop taking your prescribed glaucoma medications, change your dosage, or combine drops without explicit instruction from your ophthalmologist, as this can cause a dangerous spike in pressure.

The Role of Standard Treatments

In most types of glaucoma, doctors use Selective Laser Trabeculoplasty (SLT) to clean out the eye’s drain. Because SLT does not alter the pressure in the episcleral veins, its effectiveness can be limited when elevated EVP is the main problem ^[6]. However, it is not automatically ineffective, and your doctor may still suggest it based on your angle anatomy ^[7][8].

Similarly, many eye drops work by helping fluid flow through the traditional drainage pathway. Elevated venous pressure limits the response to these drops, but it does not make them useless. Medications such as aqueous suppressants (which reduce fluid production) or prostaglandin analogues (which increase uveoscleral outflow, bypassing the backed-up veins) can still successfully lower eye pressure ^[2][9].

The Role of Netarsudil (Rhopressa)

A newer medication called netarsudil (brand name Rhopressa) has been discussed for this condition because it may lower the episcleral venous pressure itself ^[2][10]. In small studies of patients with conditions like Sturge-Weber syndrome, netarsudil helped lower eye pressure, though its use for this specific indication rests on limited, small-series evidence ^[2][11]. It is not a proven condition-specific standard. It frequently causes significant eye redness (hyperemia), instillation discomfort, and small deposits on the cornea (corneal verticillata) ^[2][11].

Surgical Risks and Protective Measures

If you need surgery, such as a trabeculectomy or a glaucoma drainage device, your surgeon may take extra precautions. Because your venous pressure is high, opening the eye for surgery can cause a sudden, drastic drop in pressure ^[5][12].

This sudden drop can lead to serious complications called a choroidal effusion (where serous fluid collects in the layers behind the retina) or a choroidal hemorrhage (where blood collects) ^[5][13]. To help prevent this, surgeons may consider specialized techniques on a case-by-case basis:

• Prophylactic Sclerotomies: The surgeon may create small “relief valves” in the white of the eye (the sclera) during surgery to allow fluid that builds up behind the eye to drain out ^[5][12].
• Tight Suture Techniques: Surgeons will often use extra-tight adjustable or “releasable” sutures to ensure the eye pressure stays slightly higher immediately after surgery, lowering it very gradually over several weeks ^[12][5].
• Non-Penetrating Surgery: Some surgeons prefer procedures like deep sclerectomy that do not fully enter the eye, which may reduce the risk of a sudden pressure crash ^[5].

While surgery for this condition requires careful management, these techniques allow experienced surgeons to minimize risks and protect your long-term vision ^[5][14].