Here is the refractive index of our lens pack:
Bronze and silver: 1.5
Gold: 1.6
Platinum: 1.67
Diamond: 1.74 (phone order only)
What lens thickness should I choose?
If you are moderately nearsighted or very nearsighted, you will benefit from thinner lenses because the edge thickness of the lens will be more noticeable.
Lenses with a refractive index of 1.6 are ideal for prescriptions with SPH prescription values between -2.50 and -4.00. Between -4.00 and -6.00, we recommend a lens with a refractive index of 1.67, and any prescription above this point, a lens with a refractive index of 1.74 is more appropriate.
If your prescription is over -5.00, we need to accurately measure the distance between your pupils, commonly known as PD or pupillary lens distance.
Because lenses for nearsightedness and farsightedness are different, each lens has different considerations.
Lens and frame components placed side by side (eyeglass online)
If you are nearsighted, we recommend that you minimize the thickness of your lenses, even if you choose thinner lenses.
Think of a plastic border that can hide any edge thickness better than a metal border.
Try not to order frames with lenses larger than 50 mm in diameter. Our best-matched machines will help you narrow your search.
If your vision is quite long-term, we recommend that you consider the following in addition to choosing thinner lenses:
Think of a frame with a plastic border that hides any center thickness better than a frame with a metal border.
Try not to order frames with lenses larger than 50 mm in diameter. Our best-matched machines will help you narrow your search.
Try to stay away from semi-rimless or rimless frames, as the edge thickness of the lens (the thinnest part) needs to be thicker to successfully mount the lens on the frame. This will have a knock-on effect on the center thickness, making the lens look coarser.
Order an anti-reflective coating to reduce troublesome reflections on the lens surface.
If you are unsure, please consult one of our qualified opticians.
