Perfect for rimless eyewear frames with prescriptions that have an SPH -.50 ~ -8.00; CYL: -.50 ~ -2.00  to S PH +4.00 ~ +8.00  CYL -.50 ~ -2.00

Blue light blocking glasses are made with  lenses that block or filterout harmful blue rays that emit from computer screens on phones, laptops, computer screens and tablet screens. The lenses keep your eyes protected from glare and potentially reduce eye health problems the retina sustains during prolong exposure to blue light. 

Spheric lenses have a single curve in their design, while aspheric lenses offer varying deflection  This unique design make lenses thinner and create an over all flat surface making them esthetically pleasing because they prevent magnifcation of your eyes.