The goal of this clinical trial is to learn about the influence of artificial tears on measurements of healthy eyes with three different devices. The main questions it aims to answer are: * Do artificial tears alter the measurements of the corneal surface * Is there a difference between the devices used in this study This is relevant because high quality measurements improve the postoperative outcome after cataract surgery.
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Does the application of artificial tears (Artelac EDO) alter the measurement of the anterior surface of the cornea (K mean in Diopters) using devices that either use keratometry or Scheimpflug-technology (IOL Master 700, Pentacam AXL or Galilei G6)
Timeframe: Comparison between the baseline measurements and the measurements 30 seconds after artificial tear application