Laser-Assisted In Situ Keratomileusis (LASIK) is one of the most common procedures performed globally to correct refractive errors. Preparing correctly for the operation plays a significant role in achieving a successful outcome and a smooth recovery. A frequent question concerns whether patients must fast beforehand, a standard requirement for many other surgical procedures. Understanding the specific guidelines surrounding food and drink helps ensure the patient arrives at the clinic in the best possible condition for treatment.
Eating and Drinking Guidelines Prior to LASIK
A fasting period is generally not required before undergoing LASIK surgery. Patients are encouraged to consume a light, healthy meal prior to their appointment to maintain stable blood sugar levels. Good options include toast with eggs or oatmeal with fruit, which provide sustenance without being overly heavy. Avoiding an empty stomach helps prevent lightheadedness or feeling faint during the procedure.
Avoid very rich, spicy, or difficult-to-digest foods that could cause stomach upset while lying down. Specific beverages require restriction, most notably alcohol and caffeine. Alcohol should be avoided for at least 24 hours before and after the surgery, as it can dehydrate the eyes and body tissues. Many clinics also suggest avoiding caffeine, such as coffee and energy drinks, on the day of the procedure.
Why Pre-Procedure Fasting is Necessary
The difference in preparation for LASIK stems from the type of anesthesia used. Since the procedure does not involve general anesthesia, there is no risk of aspiration, which is the primary reason for fasting before most major surgeries. The goal of the dietary guidelines is focused on patient comfort and physiological stability throughout the operation.
Consuming a balanced meal prevents the dizziness, weakness, or anxiety that can result from low blood sugar. Avoiding heavy foods minimizes the possibility of nausea or heartburn while lying flat under the laser. Avoiding caffeine is important, as its stimulating effects can increase anxiety and cause jitteriness, making it difficult for the patient to remain perfectly still and focused during the laser application.
Essential Non-Dietary Preparation Steps
Day-of Hygiene and Attire
Beyond diet, several other preparations are important for the day of the procedure to ensure a sterile environment and accurate laser function. Patients must arrive completely free of makeup, lotions, or creams on the face or around the eyes. These products can harbor bacteria, increasing the risk of infection, or leave residue that may interfere with the laser’s precision.
Similarly, scented products like perfume, cologne, or hairsprays should be avoided. The volatile organic compounds from these fragrances can impact the air quality and potentially the laser equipment. Patients should wear comfortable, layered, and lint-free clothing, as the laser suite is often kept at a cool temperature.
Pre-Procedure Requirements
The most important non-dietary step is arranging transportation, as patients are temporarily unable to drive immediately following the procedure due to blurred vision and light sensitivity. Additionally, patients are advised to stop wearing soft contact lenses typically one to two weeks before the procedure, and longer for hard or gas permeable lenses. This time allows the cornea to return to its natural, unwarped shape, ensuring accurate pre-operative measurements for the surgeon.