隱形眼鏡d是什麼意思

"D" in the context of contact lenses typically refers to the diameter of the lens. Diameter is the measure of the distance across the lens, from one edge to the other. It is important to get the correct diameter for your contact lenses to ensure they fit comfortably on your eyes and provide clear vision.

The diameter of contact lenses is usually measured in millimeters (mm), and the "D" you see may be referring to this measurement. For example, if you see "14.2D" or "14.5D", this would indicate that the diameter of the lens is approximately 14.2mm or 14.5mm, respectively.

It's important to consult with an eye care professional to determine the correct diameter for your eyes, as well as other important parameters such as base curve and power. They will be able to provide you with the best fitting and most comfortable contact lenses for your eyes.