Light sensitivity after PRK typically resolves within 7 to 10 days, though some degree of sensitivity to bright light can linger for several weeks. The first two to three days are the most intense, when even dim indoor lighting can feel overwhelming. From there, it gradually improves as the surface of your cornea heals.
The First Week: Peak Sensitivity
PRK works by reshaping the cornea after removing its outermost layer, called the epithelium. That exposed surface is what makes your eyes so reactive to light in the days immediately after surgery. A bandage contact lens is placed on the eye to protect it while this layer regrows, which takes about three to five days.
During those first two to three days, light sensitivity is at its worst. Many people describe it as feeling like staring directly into the sun. The natural reflex is to keep your eyes shut, and most patients spend this period in a darkened room. Even a phone screen at its lowest brightness setting can feel too intense to look at for more than a few minutes. By the end of the first week, the epithelium has typically closed over, the bandage lens comes off, and light starts to feel more tolerable, though not yet normal.
Weeks Two Through Four
Around the two-week mark, most people notice a significant shift. Screen use becomes comfortable again, and indoor lighting no longer causes discomfort. For the majority of patients, functional light sensitivity is largely gone by this point.
That said, bright sunlight and glare can still bother your eyes for several more weeks. Foreign body sensation, blurred vision, and excessive tearing can persist for up to three months after PRK, and some of these symptoms overlap with or worsen the feeling of light sensitivity. This is a longer timeline than LASIK, where similar symptoms tend to resolve faster, because PRK requires full regrowth of the corneal surface rather than healing a small flap.
When to Expect Full Comfort Outdoors
Even after indoor light sensitivity fades, your eyes remain more vulnerable to ultraviolet light for months. Walter Reed National Military Medical Center recommends wearing UV-blocking sunglasses full time during the first month after PRK, then as much as possible through months two through four, and whenever practical after that. This isn’t just about comfort. UV exposure during the healing window can contribute to corneal haze, a clouding of the cornea that causes glare and blurred vision.
Corneal haze, when it develops, typically appears one to three months after surgery and usually clears within a year. A less common form, called late-onset haze, can appear after three months and persist for several years. Both types can make light sensitivity feel worse than it otherwise would be.
Returning to Screens and Work
Most people can use a computer or phone in short sessions by the end of the first week, though it may not feel entirely comfortable. By week two, extended screen time is usually manageable. If your job involves heavy computer use, plan for about one to two weeks away from work, recognizing that the first few days back may still require breaks and reduced screen brightness.
Artificial tears help during this period. The corneal nerves that signal your eyes to produce tears are disrupted during PRK, which means your eyes may not lubricate themselves properly. Dry eyes amplify light sensitivity because an uneven tear film scatters light across the cornea instead of letting it pass through smoothly.
Why Some People Stay Sensitive Longer
About 5% of PRK patients develop chronic dry eye, which can keep light sensitivity lingering well beyond the normal recovery window. People who had lower tear production or an unstable tear film before surgery are at higher risk. If your eyes were already on the dry side before PRK, the surgery can push them past a threshold where symptoms become persistent.
Delayed epithelial healing is another cause of prolonged sensitivity. The corneal surface normally closes within three to five days, but in some cases it takes longer. When healing extends past that window, patients often experience photophobia for weeks. In documented cases of delayed healing, light sensitivity lasted three weeks or more before the cornea stabilized and symptoms resolved.
Infection or inflammation, while uncommon, can also extend the timeline. If your light sensitivity is getting worse rather than gradually improving after the first week, or if it’s accompanied by increasing pain, that pattern is worth flagging to your surgeon promptly rather than waiting for a scheduled follow-up.
A Realistic Recovery Timeline
- Days 1 to 3: Severe sensitivity. Most people stay in a dark room with eyes closed.
- Days 4 to 7: Improving but still noticeable. Short screen sessions become possible.
- Weeks 2 to 3: Indoor light and screens feel comfortable for most people.
- Months 1 to 4: Bright sunlight and glare may still cause discomfort. Sunglasses remain important.
The overall arc bends quickly in your favor. The miserable, eyes-clamped-shut phase is intense but brief. Most of the functional recovery, being able to work, drive, and go about your day without wincing at every light source, happens within the first two weeks. The remaining months are about protecting your eyes while the deeper layers of healing finish.