[Progressive Multifocal Lenses]: This collection includes 22 lenses in various strengths (1.00, 1.25, 1.50, 1.75, 2.00, 2.25, 2.50, 2.75, 3.00, 3.25, and 3.50), with two lenses for each eye, ensuring a versatile solution for vision correction [Optical Glass]: Featuring a 36mm clear optical center for an expansive field of view, these progressive lenses are made from premium materials that guarantee clarity and accuracy while remaining easy to clean for long-lasting comfort [High Quality]: Trial lenses are made of glass and metal rims with accurate refraction and high light transmission, which is very important for optometrists and vision testers [Ergonomic Design for Convenience]: The widened gap between the lenses allows for easy removal and insertion, coupled with protective slots that securely hold each lens in place to prevent slippage and scratches [Applications]: Ideal for a range of professional environments including commercial, medical, and educational settings, these progressive multifocal lenses are suitable for opticians, vision care centers, and hospital ophthalmology departments