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Which Lens Type to Choose

Eyeglass lenses are able to correct vision because they refract, or bend, light as it passes through the lens. The amount of refraction that is needed to provide good vision is determined by your eyeglass prescription. The type of lenses you require depends on your prescription.

Buying the glasses frame only gives the wearer an appearance. The most important part of the eyewear is actually the prescription lens. That is why we always recommend people to consider their lenses and lens coatings very carefully. At Comfort Sight there are many different types of spectacle lenses available that can improve your fulfilment in wearing prescription glasses.

Single vision lenses

Single vision lenses are lenses with only one prescription throughout, so regardless of looking into the distance or reading close-up, your prescription doesn't change. Single vision lenses are usually recommended for people who do not suffer from presbyopia.

Bifocal lenses

Bifocal lenses allow two points of focus in the lens. Most bifocal lenses have a D-shaped addition near the bottom of their lenses which consist of a different prescription to the main area of the lens. This allows people who suffer from presbyopia to be able to see into the distance at one prescription and read from another.

Varifocal lenses / Progressive lenses

Varifocal lenses are similar to bifocal lenses in that they are recommended for sufferers of presbyopia because they have more than one prescription. The main difference is that varifocal lenses do not have visible lines or markings (that you would get with bifocals) because the prescription progressively changes across the lens as it accommodates reading, intermediate and distance prescriptions.

Trifocal lenses consist of 3 sections: for near, intermediate and distance prescriptions. Trifocal lenses are an alternative to varifocal lenses for people who are struggling to adapt to them.

Tinted lenses

Tinted lenses are spectacle lenses with a tint, a colour filter capable of reducing light to the eyes similar to sunglasses. The tint is permanent and tinted lenses can be worn for cosmetic reasons. A range of coloured tints can be applied to most lenses, from standard sunglass tints through to specialised tints for activities such as shooting and comfort tints for night time driving. Lenses can also be tinted to various colours that in some cases aid reading for people with dyslexia.

Photochromic lenses / Transition lenses

Transition lenses (also known as photochromic lenses) are similar to tints in that they can reduce light to the eyes. Protecting from harsh glare of the sun, Transition lenses are a two-in-one product that eliminates the need for sunglasses. Transition lenses are clear when indoors and at night. Once outdoors, depending on the amount of UV light present, they change automatically to become darker going either grey or brown. Transitions lenses score high on virtually every count. They block 100% of the sun’s harmful UVA & UVB rays. They are compatible with a wide range of frame designs. They decrease glare, reduce eye fatigue and deliver UV 400 protection.

Polarized lenses

Polarized lenses can reduce glare, the reflection of light from shiny non-metallic surfaces such as water. Polarized lenses are very popular with drivers and outdoor sport players.

Plastic lenses

Plastic lenses are very light, very cheap, very sturdy and viable for spectacles. Standard plastic lenses tend to be much thinner and cheaper than glass lenses of the same prescription.

Polycarbonate lenses

Polycarbonate lenses are ten times more impact-resistant than standard plastic lenses. Polycarbonate lenses are lighter and thinner than plastic lenses and provide good eye protection.

MR8 lenses

MR8 lenses are more impact-resistant than polycarbonate lenses. MR8 lenses are thinner and lighter lenses. MR8 lens passes US-FDA impact resistance standard. MR8 lenses are minimal chronic aberration and high transparency. MR8 lenses are flexible and perfect for rim-less frames and high curve designs.

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