Spectacle LensesWe take advantage of the latest optical technology to offer you the thinnest, lightest materials and advanced coating choices on all of our spectacle lenses and prescription sunglass lenses. All of our multicoated lenses come with a two-year manufacturer’s guarantee and, depending on your particular eyecare requirements, our range includes:

  • Spectacle lenses with specialised coatings: extra-thin, light weight, easy to clean, anti-fog/mist coatings designed to reduce reflections by up to 99.9%
  • Multifocal (graduated) lenses
  • Transitions® lenses which adapt to different lighting conditions (Insight is an official preferred Transitions® supplier)
  • Lenses that are digitally designed to eliminate ‘swimming effects’
  • Award-winning, light-responsive Drivewear® lenses.

After assessing your eyes, our optometrist will advise you on a range of suitable spectacle lenses options to be matched to your chosen frames. Visit our Designer Eyewear and Sunglasses catalogues to view our range of fashion frames, or read more about our lenses below.

Single Vision Stock

Single Vision Stock lenses are prescription lenses used for patients that need correction for either distance or near vision. They have the same optical focal power or prescription over the entire lens. Stock lenses are pre-made into a limited range of powers and are ideal for lower prescriptions. Since stock lenses are pre-made and 'off the shelf' it usually cuts down the time and cost involved in making prescription glasses. Stock lenses are limited to the following powers: Minus: zero to -3.50D, Plus: zero to +2.75D, Cylinder (Astigmatism) zero to -2.00D.

Single Vision Grind

Single Vision Grind lenses are custom made for the patient’s prescription and are usually required if the patient has a higher prescription than is available in single vision stock lenses. Like single vision stock lenses, they have the same focal length over the entire lens. Grind lenses can also be useful with different types of spectacle frames, mainly rimless or semi-rimless. Since these lenses are custom made they are usually a bit more expensive and take slightly longer to manufacture than single vision stock lenses.


High-Index is used to describe a category of plastic material that is lighter and thinner than standard (CR39) plastic.  High-Index includes 1.54, 1.67 and 1.74 (known as Ultra High-Index).  As the index increases, the thinner and lighter the lens. A lens made of 1.67 index material is half the thickness of a standard plastic lens of 1.5 index material. UV protection is also inherent in High-Index plastic lenses. Importantly, High-Index plastic material enables those with stronger prescriptions to achieve a more aesthetically appealing look (no more coke bottle glasses).

Transitions lenses

Transitions lenses change colour when exposed to UV light. They work with virtually all prescriptions in single vision, progressive and bifocal designs and materials. They are appropriate for children, adults and especially for those with a heightened sensitivity to light. These everyday lenses provide optimal balance between outdoor darkness, indoor clarity and speed of activation.

Bifocal Lenses

Bifocal lenses give clear vision at two viewing distances only, distance and near. They have a visual line separating the two viewing zones. Bifocals are a very old design and do not provide intermediate (computer) vision.

Multifocal Lenses

Multifocal lenses, also called Progressive or Graduated Lenses, have replaced bifocals as the lens of choice. As we approach the ages of 40 and 50, our near vision begins to deteriorate, causing problems with tasks such as reading, sewing and other close work. While single vision reading lenses will give you clear vision up-close, distant objects like the television will be blurry. The ideal solution is progressive lenses, which cosmetically look exactly like single-vision lenses but allow you to see clearly up close and at intermediate and long distances – eliminating the need for you to constantly change spectacles for different tasks. A period of adaptation is usually required as these lenses have a more complex design, but in the long term the advantages of wearing progressive lenses are significant. One way of speeding up adjustment to your new multifocal lenses is to consciously point your nose at whatever you are looking at.

Extended Readers

Extended Readers are a type of multifocal lens that provides a large intermediate and reading zone with less distance vision. If you work in an office environment or spend time on a computer, this option can deliver greater benefits and flexibility. This lens can be used all day at the office but is not recommended for driving.

Anti-reflective or Multi-coating

Anti-reflective or Multi-coating is a multi-layer protective coating on both surfaces of the lens that enhances the visual performance, comfort and look of your lenses. Glare from computer screens, overhead lights and night driving can cause eyestrain. Anti-reflective coatings alleviate discomfort by reducing unwanted glare and reflection, allowing the eye to see in precise detail.

UV Coating

While regular plastic spectacle lenses block the majority of UV light, you can boost this to 100% for greater protection. This is not required for polycarbonate lenses and other high-index plastic lenses as they already have 100% UV protection built in.

Blue Control

Blue Control is a coating that is added to a prescription lens that neutralises the blue light emitted from many screen-based devices, preventing eye fatigue and eye strain. This keeps the eyes in better condition while offering more comfortable and relaxed vision. From early morning to late at night we use all kinds of digital devices, such as computers, smart phones, tablets, television screens, and GPS devices. They all emit blue light, also known as high energy visible light. Although blue light is a natural phenomenon – it is present in daylight and helps us keep awake – excessive amounts can have an adverse effect and cause:

  • eye strain and fatigue
  • red and irritated eyes
  • blurry vision
  • back, neck and shoulder pain
  • headaches