Epithelial Bogging with Scleral Lenses

Scleral lenses offer life-changing vision for patients with keratoconus, corneal irregularities, and severe dry eye, but like any contact lens, they can occasionally produce complications that require professional evaluation. One condition that scleral lens wearers in Las Vegas should be aware of is epithelial bogging, a relatively common and typically benign finding that can appear after several hours of lens wear.

What Is Epithelial Bogging?

Epithelial bogging occurs when the corneal epithelium, the outermost layer of cells on the surface of the cornea, absorbs fluid from the saline solution that fills the bowl of a scleral lens. Over several hours of wear, this fluid exposure can cause the epithelial cells to swell slightly, creating a waterlogged appearance on the corneal surface. The effect is similar to what happens to the skin on your hands after a long bath. Just as your fingertips become wrinkled and puffy from prolonged water contact, the corneal surface can develop a subtle textured appearance from extended exposure to the saline reservoir.

How Is Epithelial Bogging Detected?

Epithelial bogging is typically discovered during a routine follow-up exam after the scleral lens is removed. Your eye doctor will apply a diagnostic dye called fluorescein to the corneal surface and examine it under a special blue light. The bogging produces a staining pattern, often most visible near the limbus (the border between the cornea and the white of the eye), that can look very similar to punctate keratitis, a pattern of tiny dot-like disruptions on the corneal surface. Because the two conditions can appear nearly identical, careful evaluation by an experienced scleral lens practitioner is important to distinguish between them.

In many cases, the patient has no symptoms at all. For instance, a patient may present for a follow-up visit after six hours of comfortable lens wear with no complaints, yet fluorescein staining reveals a limbal pattern consistent with epithelial bogging. This is one reason why regular follow-up appointments are essential for all scleral lens wearers, even when the lenses feel perfectly comfortable.

Is Epithelial Bogging Harmful?

Epithelial bogging is generally considered a benign finding. In most cases, the corneal surface returns to its normal appearance within hours after the scleral lens is removed. However, your eye doctor will want to rule out other conditions that can produce similar staining patterns, such as inadequate limbal clearance, solution toxicity, or early signs of corneal compromise. If bogging is persistent or worsening over time, your doctor may make adjustments to your lens fit or wearing schedule.

How to Reduce the Risk of Epithelial Bogging

• Always fill your scleral lens with fresh, preservative-free saline from single-use vials before each insertion. Multi-use bottles carry a higher risk of contamination and may contribute to corneal surface changes.
• Follow the wearing schedule recommended by your doctor. Gradually increasing wear time during the adaptation period allows your cornea to adjust.
• Attend all scheduled follow-up appointments so your doctor can monitor the health of your cornea beneath the lens, even if you are not experiencing any discomfort.
• If you notice any new symptoms such as blurry vision, redness, or discomfort after lens removal, contact your eye care provider promptly.

When Should You Seek Immediate Care?

While epithelial bogging itself is not an emergency, certain symptoms during or after scleral lens wear do require urgent attention. Remove your lens and contact your eye doctor right away if you experience sudden pain, significant redness, light sensitivity, discharge, or a noticeable decrease in vision. These may indicate a corneal infection or other serious condition that needs immediate treatment.

At Insight Vision Optometry, Las Vegas, our scleral lens specialists Dr. Stephanie Woo, OD, FAAO, FSLS, Dr. Nathan Schramm, OD, FSLS, FBCLA, and Dr. Thanh Mai, OD, FSLS have extensive experience managing the full range of scleral lens complications, including epithelial bogging. Using advanced imaging such as anterior segment OCT and corneal topography, our team can evaluate your corneal health in detail and optimize your scleral lens fit. Call 702-747-4070 or visit www.insightvisionlv.com to schedule your scleral lens follow-up.