Understanding the Term 'Hypersecretion Glaucoma'

If you have heard the term hypersecretion glaucoma, you may find that it does not appear in modern brochures or current clinical guidelines. It is important to know that while the name itself has largely fallen out of favor in modern ophthalmology, the high eye pressure it describes is a very real clinical finding that doctors manage every day.

First, it is helpful to distinguish between two related concepts: ocular hypertension means your eye pressure is high but there is no detectable damage to your optic nerve yet. Glaucoma means that the pressure has caused characteristic damage to the optic nerve or your visual field. Not everyone with high pressure has glaucoma, but high pressure is the primary risk factor.

Historically, the “hypersecretion” label was used to describe a specific theory: that the eye’s pressure was rising because it was producing too much fluid, rather than the more common problem where the fluid cannot drain out ^[1][2]. Today, most specialists view this term as a historical way of thinking about the eye’s fluid balance rather than a distinct, standalone disease.

The ‘Faucet and Drain’ Concept

To understand why your doctor might have used this term, it helps to look at how the eye maintains its shape and health through aqueous humor dynamics (the way fluid moves in and out of the eye). You can think of your eye like a sink with a faucet that is always running and a drain that is always open ^[2][3].

• The Faucet (The Ciliary Body): This structure behind the iris constantly produces a clear fluid called aqueous humor. This fluid carries nutrients to parts of the eye that don’t have blood vessels ^[2].
• The Drain (The Trabecular Meshwork): This is the eye’s primary drainage system. In most types of glaucoma, this “drain” becomes clogged or resistant, causing fluid to back up and pressure to rise ^[4][1].

The theory of hypersecretion suggested that the “faucet” was turned up too high ^[1]. If the faucet produces fluid faster than even a healthy drain can clear it, the intraocular pressure (IOP) increases ^[2][3].

Why the Term Is Controversial

In the past, doctors used a test called tonography to try and estimate how well the eye’s drain was working ^[5]. If the drain seemed mechanically open but the pressure was still high, they often concluded the eye must be “hypersecreting” fluid.

However, modern research has challenged this idea for several reasons:

• Measurement Difficulty: Accurately measuring exactly how much fluid the eye produces is extremely difficult in a clinical setting ^[6][7].
• Hidden Drain Issues: Many cases once thought to be “overproduction” were later found to have subtle drainage problems that older tests simply couldn’t detect. Even if the drain is anatomically “open,” it may still have microscopic resistance ^[8][9].
• Secondary Causes: High pressure is often found to be a “secondary” effect of something else—such as a reaction to steroid medications, underlying inflammation (uveitis), or rare vascular issues—rather than a primary overproduction of fluid ^[10][11].

Because of these findings, modern guidelines categorize these patients based on the true underlying mechanism—whether that is primary open-angle glaucoma, a specific secondary glaucoma, or simply ocular hypertension ^[10][12].

Focus on Treatment, Not the Label

The most important takeaway for you is that the result (elevated pressure) is what matters for your vision. The goal of treatment is always the same: to lower the pressure to a safe level to protect the optic nerve ^[13][12].

Standard treatments are highly effective at managing the pressure, even if the label used to describe it is outdated:

1. “Inflow” Medications: Some eye drops, such as beta-blockers or carbonic anhydrase inhibitors, specifically work by “turning down the faucet” (reducing fluid production) ^[2][14].
2. “Outflow” Medications: Other drops, such as prostaglandin analogs, help the eye’s drainage pathways clear fluid more efficiently ^[14][15].
3. Laser and Surgical Options: Procedures like Selective Laser Trabeculoplasty (SLT) or MIGS focus on improving the drain’s function to lower pressure ^[9][16].

While the term “hypersecretion glaucoma” might feel confusing, your care team is focusing on the same evidence-based goals used for all glaucoma patients: finding your target IOP (the pressure range where your eye is safe) and monitoring your vision closely through imaging and field tests ^[13][17].