Both eyes on the same day, or one at a time? Booking the choice abroad

Two ways to schedule the same surgery

When people say "I'm getting LASIK," they almost always mean both eyes, in one session, on one morning. That is the standard approach for laser procedures. The NHS notes that both eyes are usually treated on the same day, though some lens surgery is done on separate days (NHS, reviewed 2024).

The alternative is sequential treatment: one eye first, the second eye after an interval set by the surgeon. Patients at home sometimes choose this freely. Patients abroad often never hear it mentioned, because a single-session plan fits so neatly into a short trip. It is worth understanding both before you book, so that whichever the surgeon recommends, the trip already has room for it.

What the FDA says about the trade-off

The FDA lists bilateral simultaneous treatment as one of the additional risks of LASIK. Its reasoning is simple: treating both eyes at once is riskier than separate surgeries because you lose the chance to see how the first eye responds before the second is treated, and both eyes may be blurred during early healing (FDA, 2018).

That is not the FDA telling you to avoid same-day treatment. It is the FDA naming the trade-off, so patients can weigh it with their surgeon. On one side: a single procedure, one recovery, a shorter trip. On the other: information from the first eye that could change the plan for the second, and always having one eye that has not been operated on while the first heals.

How each option reshapes the trip

When separate days are more likely

You cannot predict the surgeon's recommendation from home, but some situations make sequential treatment more likely to come up:

• Lens-based procedures. If the plan is a lens implant or lens replacement rather than laser surgery, the NHS notes some of these are done on separate days.
• Very different eyes. If your two eyes have very different prescriptions or corneal measurements, a surgeon may want to see one result before committing to the other.
• Health factors. Conditions that affect healing, which the FDA lists as including diabetes, autoimmune disease and some medications, may make a surgeon more cautious (FDA, 2018).
• Your own preference. Some patients simply want the reassurance of seeing how one eye does first. That is a legitimate reason to ask.

Booking a same-day plan well

If the surgeon plans both eyes together, the trip is shorter, but you will start the recovery with no "good eye" to rely on. That makes a few preparations more important:

• Bring a companion for surgery day and the next-day check. The FDA tells patients to arrange transport to and from surgery and the first follow-up, and not to drive (FDA, 2018).
• Set up the room before you leave for the clinic. Drops lined up, phone charging within reach, sunglasses by the bed, food in the fridge.
• Plan for screen-free time. Download audiobooks or podcasts before surgery; reading with both eyes freshly treated is not much fun.
• Keep some slack after the next-day check in case the surgeon wants to see you again before you fly.

Booking a separate-days plan well

One long stay or two trips?

The interval between eyes is the surgeon's decision, and it determines whether one stay or two trips makes more sense. A short interval usually means staying put. A longer one may make two shorter trips more practical, especially if you live within a reasonable flight of Colombia.

Ask the clinic for the interval in writing before you book anything. Then compare the cost of extra nights with the cost of a second round trip, including the extra leave from work.

Living with one treated eye

Between surgeries you will have one corrected eye and one uncorrected eye. Depending on your prescription, that can feel strange: blurred depth, a sense of imbalance, glasses that no longer suit one side. Ask the surgeon what they want you to do in between. Some allow a contact lens in the untreated eye; others do not, because lens wear can affect the measurements for the second operation. The FDA's general guidance is that contact lenses must be stopped before pre-op measurements, with longer stop times for rigid and hard lenses (FDA, 2018).

Driving and getting around

Even if you feel you can see well enough with one treated eye, do not drive until the surgeon says you can. In Medellín or Bogotá that is rarely a hardship, since taxis and ride apps are easy, but plan for it if you were intending to hire a car.

Two sample trip shapes

To make the difference concrete, here is how the same patient might lay out each plan. These are illustrations of structure, not schedules to copy; the real days come from your surgeon.

Same-day plan

1. Arrival and rest.
2. Pre-op exam and consult.
3. Surgery on both eyes; rest for the remainder of the day.
4. Next-day check.
5. Quiet days in the city, with any further check the surgeon requests before you fly.

Separate-days plan, single stay

1. Arrival and rest.
2. Pre-op exam and consult.
3. Surgery on the first eye.
4. Next-day check on the first eye.
5. The interval the surgeon chose, living with one treated eye.
6. Surgery on the second eye, with any re-measurement the surgeon wants first.
7. Next-day check on the second eye, then any further check before you fly.

The second list is not just longer; it has two moments of real decision in it. After the first eye's check, the surgeon may adjust the plan for the second. That is the benefit the FDA's risk page describes, and it is why some patients and surgeons prefer to work this way despite the extra days.

The money questions

Ask the coordinator to quote both options before you travel, with these lines visible:

1. The surgical fee for both eyes together versus each eye separately.
2. The number of post-op visits included in each case.
3. Whether medication is supplied for one course or two.
4. Whether the enhancement policy is the same either way.

Then add your own costs: nights, meals, transfers, flights, and the value of extra days off work. The surgical price difference, if any, is often smaller than the travel difference. Our guide to reading a Colombian quote shows where these items normally sit.

Questions to put in your inquiry

• "Do you usually treat both eyes on the same day for the procedure you expect to recommend for me?"
• "Is there anything in my records that would make you prefer separate days?"
• "If separate, what interval would you want, and could the second eye be done on a later trip?"
• "What should I do about vision in the untreated eye between surgeries?"
• "How many follow-up visits would you want before I fly home after each eye?"

Answers to those five questions let you book a trip that matches the plan, rather than hoping the plan matches the trip. If you are trying to fit everything into the shortest possible stay, read exam and surgery on the same trip alongside this piece; the two decisions affect each other.

What not to do

• Do not push for same-day treatment to save a hotel night if the surgeon has a medical reason for separating the eyes.
• Do not book a non-changeable return until you know which plan the surgeon has chosen.
• Do not assume the second eye will go exactly like the first. The point of separating them is that the surgeon may adjust.
• Do not skip the next-day check after the first eye because it felt fine. It is part of what makes sequential treatment worth doing.