Preparing Your Eyes Before Eye Surgery

Key overview

  • Untreated dry eye before surgery predicts worse symptoms afterwards, and surgeons increasingly treat it pre-operatively.
  • Allow six to twelve weeks of optimisation where the schedule permits. Lid treatment is slow.
  • Dry eye also distorts the measurements used to plan surgery, which can affect the outcome you get.
  • Lens wearers must stop wearing lenses for a period before assessment. Confirm the length with your surgeon.

The most useful thing anyone can tell you about dry eye and eye surgery is that the productive conversation happens beforehand. Almost every form of eye surgery produces some dryness; how much, and for how long, depends substantially on the state of your ocular surface on the day.

Why it matters more than people expect

Pre-existing dry eye is consistently identified as the strongest predictor of troublesome post-operative dryness. Surgery disrupts nerves, introduces inflammation and adds weeks of drops, and an ocular surface already struggling has less reserve to absorb that.

There is a second reason, less discussed and arguably more important. The measurements used to plan refractive and cataract surgery — corneal topography, biometry for lens power — are taken from the tear film's optical surface. An unstable film produces unreliable readings, and unreliable readings produce a less accurate result. Treating the surface first is partly about comfort and partly about getting the vision you were aiming for.

What an optimisation period looks like

Where the schedule permits, six to twelve weeks. Lid treatment is slow and there is no compressing it.

  • Daily heat and expression if there is any meibomian gland dysfunction, which in practice means most people over forty.
  • Lid hygiene daily, particularly if there is any blepharitis. See routines by severity.
  • Preservative-free lubrication rather than preserved, since you are about to add weeks of post-operative drops.
  • Omega-3 if you are starting it — the twelve-week clock may as well begin now. Tell the surgical team, as many ask patients to stop fish oil before surgery; see interactions.

Raise it yourself if nobody else does

Practice varies. Some surgeons assess and treat the surface routinely; others focus on the procedure. If you have dry eye symptoms and nobody has asked, say so at the pre-operative appointment — and say it in specifics: how many hours before discomfort, whether you use drops and how often, whether your lids crust in the morning.

It is a reasonable question to ask whether your tear film has been assessed and whether the measurements were taken on a stable surface.

Contact lenses

Lens wearers are asked to stop for a period before assessment, because lenses alter corneal shape and the measurements need a settled cornea. The length varies with lens type — often days for soft lenses, considerably longer for rigid ones. Confirm the period with your surgeon and follow it exactly; going back in "just once" invalidates the scan.

Use the time productively — a lens break is an ideal window for lid treatment.

Realistic expectations

Optimisation reduces post-operative dryness; it does not eliminate it. You should still expect some dryness afterwards, and for most people it resolves. What preparation changes is the severity and the duration, and in refractive surgery whether you are a suitable candidate at all — significant untreated dry eye is a reason some surgeons decline to operate, which is a judgement in your favour rather than an obstacle.

Where our products fit

Where there is a six-to-twelve week window before surgery, the Dry Eye Starter Package covers heat, lid hygiene and supplementation together. Check with your surgeon before using heat close to the operating date.

Part of our guide to Eye Surgery & Recovery.