Thinner lenses are made from materials which have a higher refractive index than standard glass or plastic. This means that less lens thickness is needed to achieve the same focusing properties. Modern aspheric designs also mean that the curvature of a lens will be flatter to give a better cosmetic appearance.
There are many brand named ophthalmic lenses available. Our number one supplier is Rodenstock who are the leading manufacturer in designs of the newst forms of both high index materials as well as Free form technology in Multifocal design.As an independent practice though we can offer any of the manufacturers as we are not restrcted by company policies!
How to find the right lenses for you
Here’s Some great advice from leading Lens manufacturer NIKON
Ophthalmic lens technology has advanced to cater the varying needs of visual correction. There are more than a few types of spectacle lenses to choose from to fit the conditions of wearer’s activities. If you need a spectacle prescription, there are several factors to consider when choosing the right lenses for you; which types of lenses to pick, the materials made in, and some optional coatings to maximize the comfort when wearing.
Step 1 Types of Lenses
Single Vision Lens
If you are under age 40 and need a 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 (Multifocal Lenses)
Progressive lenses provide a gradual transition in power within the lens to view all distance from near at hand to far across the room. If you are in your 40s or older and have presbyopia, wearing progressive lenses have an advantage to see all distances clearly without taking the eyeglasses off and on.
Step 2 Lens Materials
Resistant to scratches. However glass lenses are heavy compared to plastic lenses and prone to breakage. It’s not recommended for children or those who are active in sports.
Standard plastic lenses, also known as 1.50 index is the most commonly used material for low pwer 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 eye care professional which material will be est for you based on your individual Rx and your selection of frame style.
High-Index lenses are typically have a material index of 1.60. High index lenses are thinner than mid-index and an excellent option for drill mount frames.
Ultra High-Index Plastic
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. Ask your eye care professional what material will be best for you, based on your individual prescription and the frame style you select. Remember, the higher the material index the thinner the lens.
Step 3 About Coatings
- Anti-reflective coatings help transparency in the lens and glare from various lightings.
- UV coatings protect eyes from absorbing harmful UV rays. Long term exposure can damage DNA and it’s cumulative and irreversible. The UV coating blocks the transmission of light in the ultraviolet spectrum.
- Other optional coatings such as scratch resistance, smudge and water resistant surface applications extend the lifespan of the lenswear.