What Lenses should you choose ?
1.5 index standard single vision lenses:
These lenses often come free with glasses or at a small charge. The lens thickness is standard so might show a thick centre for + prescriptions or thick outer edges for minus prescriptions. The lens thickness is not generally a problem or particularly noticeable unless the powers of the prescription needed is higher than average (above 2 dioptres on Sph's) If the frame picked is particularly large on the eye size (which can lead to thicker centres or edges) then it might be worth considering the next lens up. This is called a 1.6 index lens and is approx 24% thinner than a 1.5 index lens.
1.6 index thin lenses:
OUR VIEW - RECOMMENDED - A GREAT ALL ROUND SINGLE VISION OPTION
As stated above, these lenses are best used with a slightly stronger prescription. They offer a flatter more cosmetically pleasing thinner alternative to the 1.5 index standard lens. They are approx 24% thinner than standard lenses. These lenses offer an additional bonus, they usually come already anti glare coated. This makes the lenses less noticeable in the frame as they don't mirror light or flash back at the person viewing you, and give you an anti glare advantage, especially when driving at night and using your phone, pc etc.
1.67 ultra thin lenses:
Approx 34% thinner than standard lenses and much flatter. Cosmetically superior to 1.5 or 1.6 index lenses. These lenses are used for stronger prescriptions or wearers who want light weight lenses. These lenses also generally come with an anti glare coating. If you want very light weight, flat, cosmetically pleasing glasses and have a prescription over 3 to 3.5 dioptres you should consider these lenses.
1.56 index Photochromic (plastic) sun reactive lenses:
These lenses are slightly thinner than standard single vision lenses. They come with a sun reactive coating and a hardened coating. These lenses react to UV light and get darker quickly when the UV is high outside for example. These lenses return to their original virtually clear state when no UV is present like indoors.
The lenses available are in Brown or Grey.
Points to note. Very little reaction takes place in a car behind the windscreen. This is because UV cannot generally penetrate a modern car windscreen.
These lenses don't react as quickly in low temperatures.
There is a lifespan where the lenses are at peak performance. The Lifespan is according to the manufacturer around 2 to 3 years, at which point the colour stays more apparent in the lenses, although they will still react.
1.5 index Tinted lenses:
These lenses are standard lenses with a permanent tint absorbed into the lens through to the centre. This tint process ensures that the tint colour won't wear off. The colour is permanent and won't change if exposed to uv. These lenses are ideal for sunglasses or just with a cosmetic pale tint for effect.
1.5 index Standard Varifocals:
Entry level varifocals with some side distortion and an average reading area. These lenses are a standard thickness.
1.5 index Wide Elite Varifocals:
OUR VIEW - RECOMMENDED - A GREAT ALL ROUND VARIFOCAL OPTION
A superior option to Standard varifocals for a little more money (our view probably worth the extra)
These lenses are a standard thickness but can be pre-calibrated (made flatter and a little thinner) at no extra cost.
The width of vision is wider than Standard Varifocals. Less outer edge distortion is noticeable and the reading area is also wider for ease of use.
1.5 index Ultra Wide Varifocals:
One for the serious perfectionist. These lenses are pre-calibrated back surface HD lenses. They offer superb wide band vision with very little edge distortion. The band width for long distance/mid range and reading is wide and the downward progression smooth. If you have the money to spare this lens is worth the extra.
1.6 index Thin Ultra Wide Varifocals:
As above but also thinner. These lenses are flatter and thinner than 1.5 index lenses. We combine the high quality varifocal design above with a thinner lens option. The material used is stronger and flatter. We automatically pre-calibrate these lenses too.
1.67 index Ultra Thin Ultra Wide Varifocals:
The Creme de la Creme of our Varifocal lenses. Ultra thin lenses with superior design for the widest band of distance/mid and reading vision. These lenses are exceptionally light weight, flat and thinner than our other options. Suitable for stronger to high prescriptions. Superb quality varifocals at a great price.