eyediology - opticians - london

Ophthalmic lens types

A lens for every occassion

Most spectacle wearers do not think too much about the lenses that will go into their glasses. Much time may be taken when choosing the right frame for you, with very little if any attention being paid to the choice of the lens. Many people do not realise that all spectacle lenses are different; your optometrist or the dispensing optician will be able to go over the variety of materials, coatings and styles that will both correct your vision and look good.

For the most part ophthalmic lenses can be separated into four main categories; single vision, bifocal, progressive additional and occupational lenses.

Single vision lenses

Single vision lenses have the same focal power throughout the entire lens and can be used to correct myopia, hyperopia, and astigmatism. Single vision lenses are usually used by eyeglass wearers under the age of 40. Nikon provides a wide range of single vision lenses that will not only meet your needs but offer you the utmost in cosmetic appeal. Our ultra-high index of 1.74 produces the thinnest and lightest plastic lens on the market today, up to 50% thinner than standard lens materials.

Bifocal lenses and Progressive additional lenses (PAL)

Bifocal lenses are for both distance vision and near vision, with the lens having two regions with different optical powers. Bifocal lenses used to be the only option for people with presbyopia who also require a correction for myopia, hyperopia and/or astigmatism; but have now been superceded by progressive lenses that have better aesthetics and tend to be more comfortable.

Progressive lenses also correct the effects of presbyopia, but instead of having two optical regions like bifocals they have a gradual change of power from near to distance vision, giving natural vision without the unsightly segment lines or image jump experienced with standard bifocals. Progressive lenses offer more comfortable vision experience at all distances.

Nikon’s progressive lenses are also available in the ultra-high index of 1.74, giving a much thinner, lighter and cosmetically appealing lens for your glasses even at higher prescriptions!

Occupational lenses

These lenses are specifically designed for particular visual functions, as opposed to regular, everyday use. For instance, Nikon has developed advanced reading lenses that correct for just near and intermediate vision, which is perfect for computer use. Occupational lenses such as Nikon Online Wide Neo are uniquely designed for sustained near-vision activities such as office and computer use.

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