Pterygium vs. Pinguecula: How to Tell the Difference

July 6th, 2026

A pinguecula is a yellowish bump that forms on the white of the eye and stays on the conjunctiva. A pterygium is a wedge-shaped growth that can spread onto the cornea, blur vision, and cause astigmatism. Both are caused by UV, wind, and dust exposure.

What Is a Pinguecula?

A pinguecula is a raised, yellowish deposit that forms on the conjunctiva, the clear membrane covering the white of the eye. It most often appears on the side of the eye nearest the nose. Pingueculae develop from long-term exposure to ultraviolet light, wind, and dust, and they are more common with age. Most stay small, cause little more than occasional dryness or mild irritation, and never spread onto the cornea. Because a pinguecula rarely affects vision, it is usually managed conservatively with lubricating drops and consistent UV protection rather than surgery.

What Is a Pterygium (Surfer's Eye)?

A pterygium is a wedge-shaped growth of fibrous tissue and blood vessels that begins on the conjunctiva and grows toward and onto the cornea, the clear front window of the eye. It is often called "surfer's eye" because it is common in people with heavy sun and outdoor exposure. Unlike a pinguecula, a pterygium invades the cornea. As it advances it can pull on the corneal surface, induce astigmatism, blur vision, and cause redness, irritation, and a gritty foreign-body sensation. A pinguecula can, over time, progress into a pterygium if it begins encroaching onto the cornea.

Pterygium vs. Pinguecula - Key Differences

What Causes Both?

Both growths share the same root cause: cumulative ultraviolet sunlight exposure, compounded by wind, dust, and a dry climate. That is why they are more common in outdoor workers, people who spend long hours on the water, and residents of sunny regions like the Houston Gulf Coast. The best prevention for both is the same - wraparound UV-protective sunglasses and a brimmed hat whenever you are outdoors. UV protection also lowers the chance a pterygium comes back after it is removed.

When Does Each Need Treatment?

A pinguecula rarely needs more than lubricating drops and sun protection, and it is only removed in unusual cases where it becomes chronically inflamed or cosmetically bothersome. A pterygium is different. It should be evaluated when it is growing toward the center of the cornea, inducing astigmatism that blurs vision, causing chronic irritation or redness, interfering with contact-lens wear, or becoming cosmetically noticeable. In those cases, pterygium removal with amniograft restores the ocular surface and lowers the chance of recurrence.

How Surgical Eye Experts Treats Pterygium in Bellaire

At Surgical Eye Experts in Bellaire, Dr. Geoffrey Collett removes the pterygium and places an amniograft (amniotic membrane) to promote regenerative healing and reduce recurrence compared with older bare-sclera techniques. The procedure is performed in our own in-office surgical suite, and because this is a single-surgeon practice, the same surgeon evaluates you, performs the surgery, and follows up. Spanish-speaking patients can read about atención en español / carnosidad. If a growth on the surface of your eye is bothering you, call our Bellaire office at 281-800-1585 to schedule an evaluation.