What Are Pinguecula and Pterygium?
Pinguecula and pterygium are noncancerous growths that develop on the conjunctiva — the thin, clear membrane covering the white of the eye. Both conditions are strongly associated with long-term ultraviolet (UV) light exposure, making them especially common among residents of sunny, tropical climates like South Florida. While the two conditions are related, they differ in how far the growth extends and whether it affects vision.
Pinguecula
A pinguecula is a yellowish, slightly raised deposit of protein, fat, or calcium on the conjunctiva. It typically appears on the nasal side of the eye (the side closest to the nose) and does not extend onto the cornea. Pingueculae are very common and usually cause no symptoms beyond a mild cosmetic concern. In some cases, they may become inflamed — a condition called pingueculitis — which produces redness, irritation, and a gritty sensation.
Pterygium
A pterygium (sometimes called surfer's eye) is a wedge-shaped, fleshy growth of tissue that begins on the conjunctiva and extends onto the cornea — the clear, dome-shaped surface covering the front of the eye. Unlike a pinguecula, a pterygium can progressively grow across the cornea, distort its curvature, and eventually interfere with vision. A pterygium may develop from a pre-existing pinguecula or arise independently.
Causes and Risk Factors
The exact cause of pinguecula and pterygium is not fully understood, but chronic UV exposure is the strongest identified risk factor. Other contributing factors include:
- Prolonged sun exposure without eye protection — the single greatest risk factor, particularly relevant in Boca Raton and South Florida where outdoor activity is year-round
- Wind and dust exposure — airborne particles cause chronic irritation to the conjunctival surface
- Dry, arid environments — reduced moisture accelerates conjunctival degeneration
- Chemical irritant exposure — occupational contact with fumes, solvents, or industrial chemicals
- Age — more common in adults over 40, though they can develop earlier with significant UV exposure
- Geographic location — people living between 37 degrees north and south of the equator (including all of Florida) have substantially higher rates
Both conditions are more common in men, likely due to higher rates of occupational outdoor exposure. People who spend significant time on the water — boating, fishing, or surfing — face elevated risk because UV rays reflect off water surfaces and intensify exposure.
Symptoms
Many pingueculae and small pterygia cause no symptoms at all and are discovered during a routine eye exam. When symptoms do occur, they may include:
- A visible yellowish bump (pinguecula) or pinkish, wedge-shaped growth (pterygium) on the white of the eye
- Redness and inflammation, especially during flare-ups
- A dry, gritty, or sandy sensation
- Itching or burning
- A feeling that something is in the eye (foreign body sensation)
- Blurred or distorted vision — occurs only when a pterygium grows onto the central cornea or distorts the corneal surface enough to induce astigmatism
Diagnosis
Both conditions are diagnosed through a comprehensive eye examination. The ophthalmologist uses a slit-lamp microscope to examine the growth, assess its size and location, and determine whether it is encroaching onto the cornea. If a pterygium is present, corneal topography may be performed to measure any corneal distortion or induced astigmatism. In rare cases where a growth appears unusual, a biopsy may be taken to rule out other conditions.
Treatment Options
Conservative Management
Most pingueculae and small, asymptomatic pterygia do not require treatment beyond monitoring. When symptoms occur, conservative options include:
- Preservative-free artificial tears — to relieve dryness and irritation
- Anti-inflammatory eye drops — short-course NSAID or mild steroid drops to reduce redness and swelling during flare-ups
- UV-blocking sunglasses — to slow or halt further growth by reducing ongoing UV exposure
Surgical Removal (Pterygium Excision)
Surgery is recommended when a pterygium:
- Grows large enough to threaten or obstruct the visual axis
- Causes significant, persistent discomfort despite conservative treatment
- Induces corneal astigmatism that affects visual quality
- Continues to grow despite preventive measures
Pterygium excision is performed as an outpatient procedure under local anesthesia. The growth is carefully removed from the corneal and conjunctival surface. To significantly reduce the risk of recurrence, Dr. Brent Bellotte uses a conjunctival autograft technique — a small section of healthy conjunctival tissue is taken from under the upper eyelid and grafted onto the area where the pterygium was removed. This technique has been shown to reduce recurrence rates from approximately 40–50 percent (with bare sclera excision alone) to under 5 percent with autograft.
Tissue adhesive (fibrin glue) may be used instead of sutures to secure the graft, which reduces postoperative discomfort and speeds healing.
Pinguecula Removal
Pingueculae are rarely removed surgically because they do not grow onto the cornea or threaten vision. Removal may be considered for cosmetic reasons or if the growth is chronically inflamed and unresponsive to anti-inflammatory drops. The procedure is similar to pterygium excision and is performed under local anesthesia.
Recovery After Pterygium Surgery
- Day of surgery: An eye patch is placed over the treated eye. Mild discomfort, tearing, and foreign body sensation are common.
- Days 1–3: Redness and irritation are at their peak. Antibiotic and anti-inflammatory eye drops are used as prescribed.
- Weeks 1–2: Discomfort decreases significantly. The graft begins to integrate with the surrounding tissue. Most patients can return to normal daily activities within a week.
- Weeks 3–6: Redness gradually fades. The eye continues to heal and the graft matures.
- Months 2–3: Full healing is typically complete. The graft blends with the surrounding conjunctiva and becomes difficult to distinguish.
Prevention
Because UV exposure is the primary driver of both pinguecula and pterygium, prevention centers on protecting the eyes from sunlight and environmental irritants:
- Wear UV-blocking sunglasses — wrap-around styles provide the most protection by blocking UV from the sides; this is especially important on the water and at the beach
- Wear a wide-brimmed hat — reduces UV reaching the eyes by up to 50 percent
- Use artificial tears regularly — keeps the conjunctival surface hydrated and reduces irritation from wind and dry air
- Wear safety goggles — when working with chemicals, dust, or in windy conditions
- Limit peak-sun outdoor exposure — UV intensity is highest between 10 a.m. and 4 p.m.
When to See an Eye Doctor
Schedule an evaluation at West Boca Eye Center if:
- You notice a new growth on the white of your eye
- An existing growth appears to be getting larger or changing color
- You experience persistent redness, irritation, or foreign body sensation
- Your vision becomes blurred or distorted
- A previously stable pinguecula or pterygium becomes inflamed
Dr. Brent Bellotte and the ophthalmology team at West Boca Eye Center provide comprehensive evaluation and treatment for pinguecula and pterygium, including advanced conjunctival autograft surgery with reduced recurrence rates. Living in South Florida means year-round UV exposure — early detection and preventive care are the best protection against progressive growth.
West Boca Eye Center is located at 9325 Glades Road, Suite 201, Boca Raton, FL 33434. Call (561) 488-1001 to schedule your appointment.
Frequently Asked Questions About Pinguecula and Pterygium
What is the difference between a pinguecula and a pterygium?
A pinguecula is a yellowish deposit on the white of the eye that does not extend onto the cornea. A pterygium is a fleshy, wedge-shaped growth that begins on the conjunctiva and grows onto the cornea. A pterygium can eventually interfere with vision if it grows large enough, while a pinguecula generally does not.
Can a pterygium grow back after surgery?
Recurrence is possible, particularly with older surgical techniques that leave the removal site exposed (bare sclera technique). Modern conjunctival autograft surgery, as performed at West Boca Eye Center, reduces recurrence rates to under 5 percent by covering the excision site with a graft of healthy tissue.
Is pterygium surgery painful?
The procedure is performed under local anesthesia, so you will not feel pain during surgery. Some discomfort, tearing, and foreign body sensation are normal during the first few days of recovery and are managed with prescribed eye drops and over-the-counter pain relief.
Does a pinguecula need to be removed?
In most cases, no. Pingueculae do not grow onto the cornea or threaten vision. They are typically managed with artificial tears and anti-inflammatory drops when symptomatic. Surgical removal may be considered for cosmetic reasons or if the growth is chronically inflamed and unresponsive to medication.
Are pinguecula and pterygium caused by sun exposure?
Yes. Chronic ultraviolet light exposure is the primary risk factor for both conditions. People who spend significant time outdoors without UV-blocking sunglasses — particularly in tropical and subtropical climates like South Florida — are at substantially higher risk. Wind, dust, and dry conditions also contribute.
