<b>SIADEE premium blue ray cut lens, safeguard your eyes and anti digital eyestrain from screen time so For better work and better life, brings you enjoyment of digital life.</b><br> Blue light blocking reading glasses reduce eye strain, eliminate dry eyes, do not let your eyes uncomfortable ruin your daily life. this frame has a special color, clear light grey, looks like crystal, this frame is suitable for women and men. Light weight and super elastic material, comfortable to wear.<br><br> <b>What is progressive multifocus reading glasses?</b><br> Asymptotic multifocal glasses are the upper optical area of the lens used to look far and the lower optical area used to look near. The degree of the middle gradually change, which used to look at the intermediate area. Most people wear progressive multifocal glasses need about a week of adaptation, but the adaptation period varies from person to person, walk slower when feel dizzy.When go down stairs, please lower your glasses and use the top area. You'll feel safe and comfortable.<br><br> <b>SIADEE Progressive Multifocal Glasses</b><br> Continuous clear vision throughout the whole process: Because the added value increases continuously and gradually in the gradient area, wearers can obtain continuous clear vision from the far point to the near point through the lenses at the appropriate eye position. This kind design conforms to physiological optics and has better adaptability. The appearance is better than that of double and triple focus reading glasses. There is no subdivision line and no annular blind area. They are very suitable for people who need to look at the distance, the middle and the near.