Photokeratitis and pterygium are two eye conditions linked to ultraviolet (UV) exposure, but they affect the eye in different ways. Photokeratitis is a temporary injury to the cornea, the clear front surface of the eye, caused by intense UV exposure. A pterygium is a growth of tissue on the eye’s surface that develops after repeated irritation and sun exposure. Both conditions require a comprehensive eye exam for proper diagnosis and treatment planning.
Quick Takeaways
- Photokeratitis is a painful corneal injury caused by short-term, intense UV exposure, often called “sunburn of the eye.”
- Pterygium is a raised tissue growth on the white part of the eye that can extend onto the cornea.
- Both conditions are associated with UV exposure, especially without consistent eye protection.
- An ophthalmologist diagnoses these conditions through a comprehensive eye examination.
- Treatment ranges from protective measures and medications to pterygium removal surgery when needed.
What is the difference between photokeratitis and pterygium?
Both photokeratitis and pterygium affect the surface of the eye, but they are different conditions with different causes, symptoms, and treatment approaches.
Photokeratitis occurs when the cornea absorbs too much UV radiation in a short period of time. The cornea contains many sensitive nerve endings, so UV damage can cause significant discomfort, light sensitivity, redness, and blurry vision.
A pterygium develops differently. It is a wedge-shaped growth of conjunctival tissue, the thin clear membrane covering the white part of the eye, that slowly grows toward the cornea. Repeated UV exposure, wind, dust, and dry environments contribute to its development.
At ADV Vision, patients throughout Central Coast, California often ask about these conditions after spending time outdoors. The team commonly sees questions from patients in San Luis Obispo, Paso Robles, and Santa Maria who notice redness, irritation, or a visible growth on the eye and want to understand whether it requires treatment.
What is photokeratitis and what causes it?
Photokeratitis is a UV-related injury to the cornea that happens after intense exposure to ultraviolet light. The condition is similar to a sunburn but affects the sensitive surface of the eye.
What causes photokeratitis?
Common causes of photokeratitis include:
- Looking at the sun without proper eye protection
- Exposure to reflected UV light from snow, water, or sand
- Welding without appropriate protective eyewear
- Spending long periods outdoors in strong sunlight without sunglasses
The condition often appears after UV exposure rather than immediately during exposure. Symptoms can develop several hours later as the corneal surface becomes irritated.
According to the American Academy of Ophthalmology, UV exposure can contribute to several eye health concerns, including corneal damage and other surface eye conditions. Wearing sunglasses that block 99% to 100% of UVA and UVB rays helps reduce UV-related eye risks.
What are the symptoms of photokeratitis?
Photokeratitis symptoms commonly include:
- Eye pain or a gritty sensation
- Redness
- Excess tearing
- Sensitivity to light
- Blurred vision
- Difficulty keeping the eyes open
Symptoms can feel intense because the cornea has a high concentration of nerves. An eye doctor should evaluate persistent pain, vision changes, or severe light sensitivity to determine the cause.
What is pterygium and why does it develop?
Pterygium is a noncancerous growth of tissue that forms on the conjunctiva and may extend onto the cornea. Many people refer to it as “surfer’s eye” because it is common among people who spend significant time outdoors near UV-reflective environments.
What causes pterygium?
Long-term exposure to UV radiation is the primary risk factor for developing a pterygium. Additional contributing factors include:
- Frequent outdoor activity
- Exposure to wind and dust
- Dry or irritated eye surfaces
- Living in areas with high sun exposure
Central Coast residents often enjoy year-round outdoor activities, including beach visits, hiking, and outdoor sports. Consistent UV protection helps protect the eye surface from repeated irritation.
How does pterygium affect the eye?
A small pterygium may only cause mild irritation or redness. As it grows, it can create additional symptoms or affect the shape of the cornea, which may interfere with clear vision.
Common pterygium symptoms include:
- A visible raised growth on the white part of the eye
- Redness or inflammation
- Burning or irritation
- A foreign body sensation
- Dryness or discomfort
- Blurred vision in more advanced cases
The clinical team at ADV Vision evaluates pterygium using a comprehensive eye examination to determine the size, location, and effect on the cornea.
How are photokeratitis and pterygium diagnosed?
An ophthalmologist diagnoses photokeratitis and pterygium through a comprehensive eye examination. The exam allows the provider to evaluate the cornea, conjunctiva, tear film, and overall eye health.
What happens during an eye exam for these conditions?
During an appointment, an eye care provider may:
- Review symptoms, timing, and UV exposure history
- Check visual acuity
- Examine the eye surface with a microscope called a slit lamp
- Evaluate the cornea for irritation, injury, or changes
- Measure other aspects of eye health when needed
Photokeratitis is usually identified by signs of corneal irritation after UV exposure. A pterygium is identified by its appearance and location on the eye’s surface. The provider also evaluates whether the growth affects the cornea or vision.
According to the National Eye Institute (NEI), regular comprehensive eye exams help detect eye conditions early and support long-term vision health. A complete eye evaluation allows an eye care professional to recommend treatment based on the patient’s specific needs.
When should you see an eye doctor for eye redness or irritation?
Eye redness does not always indicate a serious condition, but certain symptoms require evaluation by an eye care professional.
Schedule an eye exam if you experience:
- Persistent eye pain
- New or worsening blurry vision
- Increased sensitivity to light
- A growth appearing on the surface of the eye
- Ongoing redness or irritation
- Symptoms that do not improve with basic eye protection measures
Patients in San Luis Obispo, Santa Maria, and Paso Robles can receive evaluation and treatment planning through the clinical team at ADV Vision. The practice provides comprehensive eye care for conditions affecting the cornea and the surface of the eye.
Can photokeratitis heal without treatment?
Photokeratitis often improves as the corneal surface heals, but an eye examination helps confirm the cause of symptoms and rule out other eye problems.
How is photokeratitis treated?
Treatment focuses on protecting the eye while the cornea recovers. Depending on the examination findings, an eye doctor may recommend:
- Resting the eyes and avoiding additional UV exposure
- Wearing UV-blocking sunglasses outdoors
- Using lubricating eye drops as recommended
- Avoiding contact lens use until the eye has healed
- Prescription medication when clinically appropriate
Patients should avoid self-treating ongoing eye pain or vision changes because several eye conditions can cause similar symptoms.
Prevention remains one of the most effective ways to reduce the risk of photokeratitis. Wearing high-quality sunglasses with UV protection and using appropriate eye protection during high-risk activities can help protect the cornea.
What are the treatment options for pterygium?
Pterygium treatment depends on the size of the growth, symptoms, and whether it affects vision. Small pterygium growths often require monitoring, while larger or symptomatic growths may require surgical removal.
Can pterygium be treated without surgery?
Yes. Many pterygium cases do not require surgery immediately. Treatment options may include:
- Artificial tears to relieve dryness and irritation
- Prescription eye drops to reduce inflammation when appropriate
- Regular monitoring during comprehensive eye exams
- UV protection to reduce additional irritation
An ophthalmologist evaluates whether the pterygium remains stable or continues growing toward the cornea.
When is pterygium removal surgery recommended?
Pterygium removal surgery may be recommended when the growth:
- Causes ongoing irritation or discomfort
- Changes the shape of the cornea
- Affects clear vision
- Continues to enlarge
- Creates cosmetic concerns for the patient
At ADV Vision, the team evaluates each patient individually to determine whether observation, medical treatment, or pterygium removal surgery is the appropriate next step.
What should patients expect after pterygium surgery?
Pterygium surgery removes the abnormal tissue growth from the eye’s surface. The goal of treatment is to address the growth and protect the health of the ocular surface.
What happens during pterygium surgery?
During surgery, an ophthalmologist carefully removes the pterygium tissue. The procedure uses techniques designed to support healing and reduce the chance of recurrence.
Before recommending surgery, the provider reviews:
- The size and location of the pterygium
- The patient’s symptoms
- Overall eye health
- Lifestyle and outdoor exposure factors
Patients receive detailed instructions about eye drops, activity restrictions, and follow-up visits after the procedure.
How long does recovery take after pterygium removal?
Recovery after pterygium surgery varies based on the individual patient and the surgical approach used. The eye may feel irritated or appear red during the healing process.
Follow-up appointments allow the ophthalmologist to monitor healing and address any concerns. Protecting the eyes from UV exposure after surgery remains an important part of long-term eye surface care.
For patients considering treatment, Pterygium Removal Surgery at ADV Vision provides additional information about the procedure and what to expect.
How does ADV Vision provide pterygium and cornea care on the Central Coast?
Patients with concerns about photokeratitis, pterygium, or other corneal conditions benefit from care that combines specialized ophthalmology with convenient local access.
ADV Vision serves patients throughout Central Coast, California, including San Luis Obispo, Paso Robles, and Santa Maria. The practice provides evaluation and treatment options for corneal conditions, including pterygium, while offering access to advanced ophthalmic care close to home.
The clinical team at ADV Vision understands that many Central Coast patients spend significant time outdoors. Sun exposure from beaches, hiking trails, agriculture, and outdoor recreation creates unique concerns for maintaining healthy eyes.
If you are experiencing persistent eye redness, irritation, or a growth on the surface of your eye, ADV Vision can provide a comprehensive evaluation. Call (805) 987-5300 or click the button below to request an appointment.
Frequently Asked Questions About Photokeratitis and Pterygium
Reviewed by the clinical team at ADV Vision. Last reviewed: July 2026. The information in this article is for educational purposes only and does not substitute for a comprehensive eye examination by a qualified eye care professional.
