Preparing for cataract surgery is straightforward, but the details matter. Most of the work happens in the days before your procedure: getting your eyes measured, adjusting your eating schedule, organizing supplies at home, and making sure your surgeon knows every medication you take. Here’s what to expect and what to do at each stage.
Pre-Operative Eye Measurements
Before anything else, your eye doctor will take precise measurements of your eye to select the right replacement lens. This process, called biometry, captures two critical numbers: the curvature (power) of your cornea and the total length of your eyeball. Together, these determine what strength of artificial lens will give you the sharpest vision after surgery. The cornea is measured with a device called a keratometer or a corneal topographer, and eye length is measured using either ultrasound or a light-based scanner. These readings are painless and take just a few minutes, but they’re the foundation of your outcome, so don’t skip or rush this appointment.
Medications Your Surgeon Needs to Know About
Bring a complete list of every medication you take, including over-the-counter drugs and supplements. Two categories deserve special attention: blood thinners and prostate medications.
Blood Thinners
Cataract surgery is classified as a minimal-risk procedure for bleeding. Current guidelines from the American College of Chest Physicians recommend continuing aspirin, warfarin, and direct oral anticoagulants like apixaban through your surgery. You should not stop any blood thinner on your own. Your surgeon and prescribing doctor will confirm the plan, but in most cases, there’s no need to pause these medications.
Prostate Medications
If you take or have ever taken tamsulosin or similar prostate drugs (alpha-blockers), tell your surgeon immediately. These medications cause a condition where the iris becomes floppy and difficult to manage during surgery. Tamsulosin causes irreversible thinning of a muscle in the iris, which means the problem can persist even if you stopped taking the drug a year ago. Your surgeon won’t necessarily cancel the procedure, but knowing about it in advance allows them to use specific techniques and medications during the operation to keep the iris stable and reduce complications like bleeding or lens capsule damage.
Whether You Need Medical Clearance
Not everyone needs a separate visit to their primary care doctor before cataract surgery. A blanket requirement for medical clearance has fallen out of favor. But certain health situations do warrant it: if you can’t lie flat comfortably, experience chest pain or significant shortness of breath with minimal activity, have a pacemaker or internal defibrillator, recently had a heart attack, are on dialysis, or take insulin. If you haven’t seen a primary care provider in a long time or have major functional limitations, a pre-surgical check-in is also a good idea. Your eye surgeon’s office will tell you whether clearance is needed based on your health history.
Pre-Operative Eye Drops
Your surgeon will prescribe antibiotic eye drops to reduce infection risk. The most commonly used antibiotics for cataract surgery are fluoroquinolones, which are broad-spectrum, fast-acting, and penetrate eye tissue well. Some surgeons ask you to start drops a day or more before surgery to build up the drug in your eye tissue. Others prefer to begin on the morning of surgery, with one drop every 15 minutes for about an hour before the procedure (a minimum of four drops). Follow whatever schedule your surgeon’s office gives you exactly.
You may also be asked to clean your eyelids in the days leading up to surgery. This involves gently massaging the upper lid downward and the lower lid upward to loosen debris from your lashes, then wiping each lid from the inner corner outward with a sterile eyelid wipe. This reduces the bacterial load around your eye. It doesn’t replace the antiseptic solution the surgical team will apply on the day of the procedure, but it gives them a cleaner starting point.
Fasting Before Surgery
Even though cataract surgery uses local or regional anesthesia rather than general anesthesia, you’ll still need to limit food and drink beforehand. The standard guidelines are:
- Clear liquids (water, black coffee, apple juice): allowed up to 2 hours before the procedure
- A light meal (toast, crackers): stop at least 6 hours before
- A heavy meal (anything fatty or fried): allow at least 10 hours
If your surgery is scheduled for early morning, the simplest approach is to eat a normal dinner the night before, skip breakfast, and have a small sip of water with any morning medications your surgeon has approved. Your surgical center will give you specific instructions, and those always take priority over general guidelines.
What to Set Up at Home Before Surgery Day
You won’t feel like running errands after your procedure, so gather everything you need ahead of time. The essentials include your prescribed eye drops (pick them up from the pharmacy before surgery day), a protective eye shield (usually provided by your surgeon), surgical tape to secure the shield while sleeping, sunglasses with full UV protection labeled UV400, clean pillowcases, and preservative-free artificial tears if your doctor recommends them.
Make a few adjustments to your space as well. Move items you use frequently to counter height so you won’t need to bend down. Stock easy meals that don’t require much cooking. Set up a comfortable spot where you can rest with your head slightly elevated. For the first day or two, you won’t be able to drive, bend below your waist, or lift anything heavier than 10 to 15 pounds, so plan accordingly. If you live alone, arrange for someone to drive you home and check in on you that first evening.
The Morning of Surgery
Wear comfortable, loose clothing. Leave jewelry and valuables at home. Skip eye makeup, face cream, and perfume or cologne, as these can introduce contaminants near the surgical site. Bring your list of medications and your photo ID. If your surgeon prescribed morning eye drops, use them on the schedule you were given.
You’ll check in at the surgical center, where the team will verify your identity and which eye is being operated on. They’ll dilate your pupil with drops, which takes about 30 minutes, and administer numbing drops or a local anesthetic. Most people are awake but sedated during the procedure, which typically lasts 15 to 30 minutes. You’ll leave wearing your protective eye shield, and someone else will need to drive you home.
Protecting Your Eye in the First 48 Hours
Wear the eye shield continuously while sleeping to prevent you from accidentally rubbing or pressing on your eye. During the day, wear your UV-protective sunglasses outdoors. Keep water away from your operated eye entirely: when washing your face for the first week, close that eye and use a damp cloth carefully around it rather than splashing water. Use your prescribed eye drops exactly as directed, and don’t substitute them with anything else.
Avoid bending at the waist, heavy lifting, and any activity that raises pressure in your head, like straining or vigorous exercise. Most people notice improved vision within a day or two, though it can fluctuate as your eye heals. Your surgeon will see you for a follow-up within 24 to 48 hours to check that everything looks right.