Eye Drops After Cataract Surgery: What They Do and How to Use Them

Dr. Keith Tokuhara, MD

Fellowship-Trained Cataract Surgeon, Desert Vision Center

You leave the surgery center with a clear shield over your eye and a small bag of eye drops. For the next several weeks, those drops are the most important part of your recovery. They are doing the work you cannot see.

Most patients are fine with the idea of using eye drops. The confusion starts when they get home and line up two or three bottles on the counter, each with a different name, a different cap color, and a different schedule. Which one is which? Does the order matter? What if I miss one? How long do I keep doing this?

These are the most common questions I hear during the first week of recovery. And they are good questions, because the drop schedule is one of the few things patients are responsible for managing on their own after surgery. Here is how I explain it.

The Three Categories of Drops

The Antibiotic

This drop prevents bacterial infection during the early healing period. You will typically use it for one to two weeks after surgery. It is the first drop to start and the first to stop. Once the incision has sealed and the risk of infection has passed, the antibiotic is no longer needed.

Some patients worry about stopping it "too soon." Follow your surgeon's instructions. Antibiotics are not meant to be used long-term in the eye, and extending them beyond the prescribed period does not add protection.

The Steroid

This is the workhorse of your post-operative drops. The steroid controls the inflammatory response, keeping redness, swelling, and discomfort in check while the eye heals. It follows a tapering schedule, meaning you start at a higher frequency, typically four times a day, and gradually reduce over several weeks.

The taper exists for a reason. Stopping a steroid abruptly can cause a rebound flare of inflammation. Think of it like slowly turning down a dial rather than flipping a switch. Your surgeon will tell you exactly when to reduce and when to stop. Even if the eye feels perfectly fine, do not skip ahead.

The NSAID (Nonsteroidal Anti-Inflammatory)

This drop works alongside the steroid but through a different mechanism. Its primary role is preventing cystoid macular edema, a type of microscopic swelling in the central retina that can temporarily blur vision. Cystoid macular edema is uncommon, but when it happens, it is frustrating because it can develop weeks after an otherwise perfect surgery.

The NSAID is your insurance policy against that. Most surgeons prescribe it for four to six weeks after surgery. Some patients notice a mild stinging sensation when they put it in. That is normal and usually lasts only a few seconds.

You may have heard that some surgeons have moved away from NSAIDs because of the risk of corneal irritation, including a rare but serious condition called corneal melting. That concern is valid, and in certain patients it makes sense to omit them. However, many of the patients I operate on are higher-risk: complex cases, patients with previous surgeries, retina patients, or eyes with a history of inflammation. For these patients, the anti-inflammatory protection that NSAIDs provide is important. I only omit NSAIDs when there is a specific reason not to use them. It is a thoughtful, patient-by-patient decision rather than a blanket policy.

Reducing the Drop Burden: Dextenza

Another way we reduce the number of drops patients need is with Dextenza, a tiny steroid implant placed in the tear duct during surgery. It is about the size of a grain of rice, and patients do not feel it.

Dextenza delivers a sustained dose of dexamethasone (a steroid) directly to the eye surface over approximately 30 days. Because the steroid component is handled by the implant, patients can skip weeks of steroid drops entirely. You will still use some drops after surgery, but the overall drop burden is significantly lighter.

The implant dissolves on its own and does not need to be removed. For patients who have difficulty instilling drops, who travel frequently, or who simply prefer a simpler recovery, Dextenza is a meaningful improvement over the traditional all-drops approach.

Not every patient is a candidate, and we will discuss whether Dextenza makes sense for your situation during your pre-operative planning. But for many patients, it is one of those advances that makes the recovery noticeably easier.

Common Mistakes (and How to Avoid Them)

Putting drops in back to back

If you use two drops within seconds of each other, the second one washes out the first before it can absorb. Space your drops at least five minutes apart. Set a timer on your phone if it helps. The five-minute gap is not a suggestion. It is how long the eye needs to absorb each drop.

Touching the tip of the bottle to the eye

The bottle tip should never contact your eye, your eyelashes, or your skin. Contaminating the tip introduces bacteria into the bottle, which defeats the purpose of using the drops in the first place. Hold the bottle about half an inch above the eye and let the drop fall in. If your hands are unsteady, rest the hand holding the bottle against your forehead for stability.

Stopping early because the eye feels fine

I mentioned this above, but it bears repeating. The eye feels fine because the drops are working. Inflammation can return if the steroid is stopped too soon. Cystoid macular edema can develop weeks later if the NSAID is cut short. Finish the course.

Not washing your hands before instilling drops

Every time you touch the bottle and bring your hands near your eye, you are introducing whatever is on your fingers. Wash your hands with soap and water before every drop session. It takes 20 seconds and eliminates a meaningful source of contamination.

Technique Matters

Many patients have never used eye drops before surgery. Here is the technique I recommend:

Wash your hands. Tilt your head back or lie down. Pull your lower eyelid down gently with one finger to create a small pocket. Hold the bottle above the eye, about half an inch away, and squeeze one drop into that pocket. Close your eye gently for about 30 seconds. Do not blink rapidly. Do not squeeze the eye shut. If the drop lands on your eyelid instead of in the eye, that is fine. Try again. With practice, it gets easier.

Some patients press gently on the inner corner of the eye (near the nose) after instilling a drop. This slows drainage through the tear duct and helps the drop stay on the eye surface longer. It is a small thing, but it can make a difference, especially with the steroid.