At Frederick Swain Optometrists, your Optometrist and our dispenser will work together with you to select the lens that is going to suit your individual needs, your lifestyle and your budget.
Lens technology has advanced in recent years to provide for all the varying needs of visual correction. There are many types of spectacle lenses to choose from.
There are several factors to consider when selecting the right lenses for your spectacle prescription; which types of lenses to choose, what materials to be made in, and some optional coatings and tints to maximize your comfort when wearing.
If you are under age 40 and need prescription glasses, then single vision lenses may be sufficient enough for your visual correction. Single vision lenses have the same focal power throughout the lens to provide a single focus.
Progressive lenses provide a gradual change in power within the lens to view all distances from near at hand to far across the room. If you are in your 40s or older and have presbyopia (needing glasses to read near print), wearing progressive lenses have an advantage to see all distances clearly without taking your glasses off and on.
Standard plastic lenses, also known as 1.50 index are the most commonly used material for low power prescriptions.
Mid-Index lenses range in material index from 1.53 to 1.56. This material is thinner and lighter than standard plastic lenses. Ask your Optometrist which material will be best for you based on your individual prescription and your selection of frame style.
High-Index lenses typically have a material index of 1.60. High index lenses are thinner than mid-index and an excellent option for rimless frame where the lenses need to be drilled.
This category of lenses ranges in material index from 1.67 to 1.74, the highest index currently available. Ultra High-Index lenses are the thinnest and lightest materials currently available for higher power prescriptions. Remember, the higher the material index the thinner the lens.
Glass is more resistant to scratches. However glass lenses are heavy compared to plastic lenses and prone to breakage. Glass is not recommended for children or people who are active in sports
There are various benefits of having a coating on your lenses.
Essilor Transitions lenses are clear indoors and at night. Once outdoors, they adapt spontaneously to varying light conditions so you can enjoy:
Essilor transitions lenses are recommended to wearers of any age. They exist in brown and gray colours, are available in a complete range of designs, materials and prescriptions (single vision, bifocal and Varilux progressive), and match any kind of frames, even the trendiest ones.
Xperio polarised sunwear gives you better protection and comfort than tinted lenses can achieve.
Ordinary tints can reduce brightness and provide UV protection (if they are properly treated), but only Xperio offers no glare, better clarity of vision, the ability to see true colours and the fact the lens colour will not fade over time.
Xperio polarised lenses completely block UV rays providing 100% UVA/UVB protection – reducing potential vision damage. Xperio allows you to experience your world more safely and more beautifully.
Xperio lenses eliminate dangerous glare – even dashboard glare – for greater driving safety. A recent clinical study measured driver reaction times for Xperio polarised lenses versus ordinary tints and found that driver reaction times were improved by 1/3 of a second. For a car travelling 50mph, 1/3 of a second allows a driver to stop a vehicle 23 feet sooner.
Xperio polarised lenses let you see even the smallest things with greater clarity, true colour perception and total comfort.
We are pleased to bring you the latest lens concepts from Essilor, Nikon, Transitions and Zeiss.