Progressive Tri-Focal Reading Glasses (No visible line) - No more needing to carry multiple pair of glasses - UVA and UVB protection. Lens are divided into 3 sections, 1/3 at the bottom is your selected power, 1/3 in the middle is slightly less than selected power, 1/3 on top is half of your selected power. Package contains 1 Tri-focal Progressive Reading Glasses and 1 microfiber cleaning storage pouch. - 60mm Lens Width, 49mm Lens Height, 143mm Frame Width - Adjustable English nose piece. Spring Hinge Design. This Multi focus Reading Glasses include 3 strengths within 1 pair of reading glasses, so you can read, view your computer monitor and converse with others, all without having to take off your sunglasses. No line and no need to remove your glasses every time you switch between activities such as reading a book and working at your computer. Multi focus Reading Glasses include three strengths within one pair of reading glasses so you can read, type on your computer and socialize with others without having to take off your glasses.