A healthy tear film (moist surface of the eye) is crucial for accurate measurements and optimal healing. If you have dry eye, your cornea’s surface can be irregular, like a bumpy or smudged lens, making pre-surgery measurements less precise.

Treating dry eye before surgery – with lubricating drops, medications, or other therapies – helps “polish the windshield” so to speak. A smoother eye surface leads to more reliable lens power calculations and can reduce post-surgery fluctuations in vision.

Additionally, dry eyes can feel scratchy or irritated, and surgery can temporarily worsen dryness, so improving your tear film beforehand means you’ll be more comfortable and likely heal faster.

In short, preparing the eye’s surface is like prepping a wall before painting – it ensures the best, most accurate results for your cataract procedure.