Eye herpes symptoms do go away with treatment, but the virus itself never leaves your body. Herpes simplex virus type 1 (HSV-1) causes the vast majority of eye herpes cases, and once you’re infected, the virus retreats into a cluster of nerve cells near your temple called the trigeminal ganglion. It stays there permanently in a dormant state, with the potential to reactivate and cause new flare-ups. So the honest answer is: each episode can heal fully, but the condition is lifelong.
What Happens Between Flare-Ups
After an active episode, HSV-1 travels back along the nerve fibers to the trigeminal ganglion, where it essentially goes to sleep. The viral DNA parks itself inside nerve cells without producing new virus particles. Your immune system, specifically proteins inside the cell nucleus, keeps the virus locked in this dormant mode. For many people, the virus stays quiet for months or years at a time. Some people never have a second episode. Others deal with repeated flare-ups.
Roughly 70% of the U.S. population carries HSV-1 or HSV-2. Most people with the virus never develop eye symptoms at all. When eye herpes does occur, it tends to affect one eye, and the pattern of recurrence varies widely from person to person.
How Quickly Each Episode Heals
The most common form of eye herpes is epithelial keratitis, where the virus actively infects the surface layer of the cornea. This type tends to resolve on its own even without treatment, though antiviral medication speeds healing and reduces the risk of complications. With treatment, most surface-level episodes clear within one to two weeks.
Stromal keratitis is a deeper, more serious form that involves inflammation in the middle layers of the cornea. This type does not resolve as easily and can cause corneal swelling, new blood vessel growth, and scarring that affects vision. Recovery takes longer, often weeks to months, and typically requires both antiviral medication and carefully managed anti-inflammatory drops. In animal models, stromal keratitis has been observed to resolve over the course of about five to six weeks, with corneal thickness returning close to normal, though some opacity may remain.
How It’s Diagnosed
The hallmark sign of eye herpes is a branching ulcer on the cornea called a dendritic ulcer. When your eye doctor applies a fluorescein dye (a harmless orange drop), the ulcer lights up under blue light in a distinctive tree-branch pattern with small bulbs at the tips of each branch. The swollen edges of the ulcer pick up a different stain called rose bengal. This pattern is specific enough that most cases can be diagnosed on sight without lab testing.
Sometimes multiple dendritic ulcers merge into a larger irregular shape called a geographic ulcer. This often happens when the infection has been present for a while or, notably, when steroid eye drops have been used inappropriately. Steroids suppress the immune response that keeps the virus in check, so using them on an undiagnosed red eye can make herpes keratitis significantly worse. Any red eye with a corneal surface defect is generally a reason to avoid steroid drops until the cause is identified.
Recurrence Rates and What Triggers Them
Recurrence is the central challenge of eye herpes. Up to 25% of people who have one episode will have another within the first year. By the end of the second year, that number climbs to about 33%. Each recurrence carries the risk of additional corneal damage, especially if the deeper stromal layer becomes involved.
Several factors can wake the virus from dormancy. Ultraviolet light exposure is one of the better-studied triggers. UV radiation appears to work in two ways: it suppresses local immune defenses in the skin and eye surface, and it directly activates cellular repair pathways that inadvertently switch on viral genes, pulling the virus out of its dormant state. Psychological stress is another recognized trigger, likely because stress hormones dampen immune surveillance. Other commonly reported triggers include fever, illness, eye surgery or trauma, and hormonal fluctuations.
You can reduce your exposure to some of these triggers. Wearing UV-blocking sunglasses outdoors is a practical step. Managing stress and avoiding eye trauma when possible also help, though no amount of caution guarantees the virus won’t reactivate.
Treatment During Active Episodes
For surface-level (epithelial) keratitis, antiviral eye drops or oral antiviral medication are the standard approach. The goal is to stop the virus from replicating so the cornea can heal. Most people notice improvement within a few days and full resolution within one to two weeks.
Stromal keratitis requires a more delicate balance. Because the corneal damage in this form comes from your immune system’s inflammatory response rather than direct viral attack, anti-inflammatory drops are often needed alongside antivirals. This is one of the few situations where steroid eye drops are appropriate for eye herpes, but only under close monitoring by an ophthalmologist. Using them without antiviral coverage, or using them for the wrong type of eye herpes, can make things dramatically worse.
Daily Suppressive Therapy
For people with frequent recurrences, taking a low dose of an oral antiviral every day can meaningfully reduce flare-ups. A major clinical trial funded by the National Eye Institute found that daily oral antiviral therapy reduced the probability of any form of eye herpes returning by 41%. For stromal keratitis specifically, the reduction was even more striking: recurrence dropped from 28% to 14%, a 50% decrease.
During the trial, only 19% of people on daily antiviral therapy had a recurrence during the treatment period, compared to 32% in the placebo group. This makes suppressive therapy a reasonable option if you’ve had multiple episodes, particularly if stromal keratitis has been involved. Your ophthalmologist can help weigh the benefits against the commitment of daily medication.
Long-Term Outlook for Your Vision
A single episode of epithelial keratitis that’s treated promptly usually heals without lasting damage to your vision. The surface of the cornea regenerates well, and most people return to their baseline eyesight.
The real risk to vision comes from repeated episodes, especially stromal keratitis. Each bout of deep inflammation can leave behind a bit more scarring, and over time this scarring can cloud the cornea enough to interfere with sight. In severe cases where scarring accumulates significantly, a corneal transplant may eventually be needed to restore vision.
The practical takeaway: eye herpes is a manageable condition for most people, but it requires ongoing attention. Getting treatment quickly when symptoms appear, using suppressive therapy if recurrences are frequent, and protecting your eyes from UV light all help preserve your cornea over the long term. The virus stays with you, but with the right approach, it doesn’t have to define your vision.