You have had your procedure, your vision is sharpening by the day, and then a gritty, sandy feeling arrives whenever you read for too long. If that sounds familiar, you are noticing one of the most common sensations people report after laser vision correction.
Dry eye after surgery is expected often enough that most surgeons raise it well before you reach the operating theatre. It rarely signals that anything has gone wrong, and for the great majority it is a passing phase and not a lasting problem. Understanding why the feeling appears, and roughly how long it tends to stay, makes the early weeks far less unsettling.
The way LASIK reshapes the surface of the eye explains much of the dryness that can follow, so it helps to start there.
Why the eye feels dry afterwards
The cornea is the clear dome at the front of the eye. It is also one of the most richly supplied surfaces in the body for sensation, carrying tiny nerves that do far more than register touch. Those nerves help signal the tear glands to keep the surface moist, and they play a part in the reflex that makes the eye water when it needs to.
The tears they help produce are not simply water. A healthy tear film is a thin coating of watery, oily and mucous layers that together keep the front of the eye smooth and comfortable. Creating the corneal flap during surgery temporarily interrupts some of the surface nerves, which briefly reduces corneal sensitivity and dampens the signal that prompts tearing.
With that signalling reduced, the surface is not lubricated as readily and the eye feels dry. Reported rates vary widely, from around 20 per cent to more than half of patients in the early period, and almost everyone notices at least some dryness at first, according to a clinical review of post-LASIK dry eye.
How long it usually lasts
The reassuring part is that the corneal nerves recover. The same review reports that corneal sensitivity drops most in the first three months, with the nerves beginning to regenerate at around three to six months and symptoms easing as they do. The Singapore National Eye Centre lists dry eyes among the common visual side effects of the procedure and notes that these are generally temporary and settle over time.
For most people the sensation is most noticeable in the first few weeks and fades over the following months. A smaller number report dryness that lingers for longer, which is one reason honest expectation setting forms part of a proper consultation. Symptoms and examination findings do not always agree either, and some people feel considerable dryness while the surface looks healthy, a reminder that the nerves, and not only the tears, are involved.
Who tends to notice it more
Some people are more prone to post-operative dryness, which is one reason screening is so thorough. Existing dry eye disease, allergy of the eyes, contact lens intolerance, incomplete blinking and a naturally unstable tear film can all make a difference, so a pre-existing tendency to dryness features among the requirements for LASIK that a surgeon works through before agreeing to operate. Where dryness is found beforehand, it is usually treated and reviewed first, so the tear film is in the best possible state going in, and recovery tends to be smoother as a result.
What helps day to day
Management is straightforward for the large majority, and your surgeon will tailor it to you. The aim in the early period is simply to keep the surface well lubricated while the nerves recover, and the measures that achieve this are easy to keep up with.
- Preservative-free lubricating drops used regularly through the day, not only when the eye feels dry
- Being mindful of screen time, since we blink less and less completely when concentrating on a screen
- Staying well hydrated and keeping direct air-conditioning or fans from blowing towards the face
- Following the prescribed post-operative drops exactly, as these support healing over the same period
- Returning for review if the dryness is severe or slow to settle, so options such as punctal plugs can be considered
None of this needs to feel like a chore. For most people the routine quickly becomes second nature and quietly falls away as the eye settles into its new normal.
When to check in with your surgeon
Most post-operative dryness is a nuisance that fades on its own, but a few signs deserve a mention to your clinic sooner. Pain that is worsening instead of easing, vision that turns cloudier after an initial improvement, or steadily increasing light sensitivity are all reasons to be seen promptly. Such problems are uncommon, and raising them here is not meant to alarm you, only to make clear that the door to your surgeon stays open throughout recovery.
Getting the right advice for your eyes
Every eye heals on its own timeline, and the surest way to know what to expect for yours is a thorough assessment before and after surgery.
At Ava Eye Clinic, our refractive surgeon Dr Lee Sao Bing examines the tear film as part of planning and reviews it through recovery, so any dryness is picked up and managed early. If you are considering laser vision correction and would like a clear, honest picture of what recovery involves, contact us for a consultation.