Sightline premium optical frame cut from Italian acetate,tumbled for multiple days and hand polished to the highest standards. German spring hinges for smooth action and long service life. These are the best of the best in the Sightline collection of reading glasses. Sightline P 307 fits individuals with larger head sizes. Correct fit is important for multifocus reading glasses to ensure lenses are properly positioned in front of the wearers’ eyes. Feel the comfort! Patented progressive power lens with anti-reflective (AR) Coating. SightLine Multifocal lenses provide the proper level of magnification for near vision tasks. Easy adapt lens technology…. If you have to adapt, send it back. Order the power you use for your old-fashioned reading glasses. Many Sightline styles available on Amazon USA based customer service and support. Reading glasses have finally evolved from single vision to multifocal, progressive lens technology! You spend a good portion of your time working with high-tech devices and displays. To stay focused for extended periods when using computers, smartphones, tablets and laptops you need better reading glasses. Traditional reading glasses magnify objects at a distance of about eighteen inches. SightLine Multifocal Readers give you a deeper field of vision than regular reading glasses, Ergonomics are improved- you can work longer in comfort.