CAIRS Recovery: A Week-by-Week Guide

CAIRS makes up a big part of my keratoconus practice, and there’s one set of questions every patient asks once we’ve booked a date: how much will it hurt, how long am I off work, and when will I actually see the result? The procedure itself gets plenty of coverage. The recovery rarely does. So here’s what actually happens, week by week, based on what my patients experience.

The first few hours

Plan for a sore eye for the first four to six hours after surgery. Not agony, but genuinely uncomfortable. Simple pain relief, keeping the eye closed and writing off the rest of the day is the right approach. Have someone drive you home and don’t plan anything for the evening.

The first four days

How the next few days feel depends mostly on the size of the segments we’ve implanted, and that comes down to how advanced your keratoconus is.

If you have milder keratoconus, the segments are smaller and there isn’t much of a stretching effect on the cornea. Most of these patients are fairly comfortable from day one and are a bit surprised by how uneventful it all is.

In more severe cases we implant larger segments, and larger segments stretch the corneal nerves more. Those patients can have quite a tender eye for three to four days after surgery. It settles, but I’d rather you expect it than be alarmed by it.

After the first few days, some patients notice mild light sensitivity for a while. In practical terms, three to four days off work is more than enough for almost everyone. Sunglasses help if your job puts you under bright lights or in front of big screens.

Weeks one to eight: the fluctuation phase

This is the part nobody warns you about, so I will. Your vision can fluctuate significantly for the first six to eight weeks, and very large swings in the first week are very common. One morning things look surprisingly good, by the afternoon they’ve gone blurry again, and the next day it’s somewhere in between. Patients who don’t expect this understandably panic. Patients who do expect it just get on with life.

The fluctuations reduce steadily over the next two months as the cornea adjusts to its new shape and the tissue settles in. Whatever you do, don’t judge your result in week one. Don’t even judge it in week four.

Six to twelve months: rock-solid stability

The cornea keeps quietly stabilising well after your vision feels settled. That matters, because for many patients CAIRS is stage one of a plan. Once the cornea is truly stable, we can consider a secondary refractive procedure to sharpen things further: topography-guided laser treatment, an implantable collamer lens, or cataract surgery if that’s on the horizon.

We wait six months, and ideally twelve, before making that call. Measuring and operating on a cornea that’s still shifting is how you end up chasing a moving target, so the patience pays for itself.

Part of why recovery has become so predictable is that the surgery itself is now so precisely planned. Every case I do is mapped with CAIRSPlan, the planning platform Dr David Gunn and I built, sized using the Brisbane nomogram we published. There’s more on both in the companion post on CAIRS long-term results.

When to call us

Recovery should follow the arc above: uncomfortable early, then steadily better. If things go the other way — pain that’s increasing after the first few days, growing redness, discharge, or a sudden drop in vision — call the clinic rather than waiting for your next appointment. Problems after CAIRS are uncommon, and the ones that matter are very treatable when we see them early.

The short version

Sore for an afternoon. Tender for up to three or four days if your segments are on the larger side. Back at work within the week. Wobbly vision for six to eight weeks, and don’t let it rattle you. Rock-solid cornea somewhere between six and twelve months, and that’s when we talk about what, if anything, comes next.

If you’re considering CAIRS for keratoconus, the treatment page covers the procedure itself, there’s a guide for patients travelling to Brisbane from interstate or overseas, and you can book a consultation to find out whether your cornea is a candidate.