If you are one of the many millions of people around the world who are either near or farsighted, then you will have to choose a form of prescription eyewear to go about your daily life. While some people will opt for corrective surgery, others may not qualify for this approach and will have to choose between contact lenses and glasses. If you're someone who doesn't really like putting their fingers towards their eyes, then you will need to choose prescription eyeglasses. The good news is that you have a wide range of different frames to pick from and can take advantage of the latest technology when it comes to vision correction. What lens materials are available to you in this modern era?
Glass
At one time, all corrective lenses were made from glass. While this material is fantastic when it comes to specifying an exact prescription, it is nevertheless rather heavy and vulnerable to breakage. You may be surprised to learn that glass is rarely used in eyeglasses these days.
Plastic
Instead, lightweight plastic is typically used, derived from the original plastic polymer versions introduced just after World War II. These also have great optical qualities but are very much lighter and cheaper than glass.
Polycarbonate
Further options came onto the market through the '80s, as polycarbonate grew in popularity. It was initially used as a protective helmet visor in the Armed Forces, as it is very impact resistant and makes a really good choice if you are an active sportsman or woman.
High-Index Plastic
Of course, look and feel are two very important characteristics when choosing a pair of spectacles. Consumers wanted something that is even lighter and thinner, and this led to the development of high-index plastic lenses in the most recent times. As with most of the other options available on the market, they have the ability to block UV rays.
Technical Measurements
Many different technical specifications govern the actual design and creation of a set of lenses. For example, the lens curvature can be altered to change gradually from the centre towards the edge. Other lenses disburse light more effectively to provide a clearer image, based on overall refraction.
These calculations can certainly be difficult for a layman to understand, but they are well within the comfort range of a good optician!
Coatings
Instead of worrying too much about high-tech, you can finalise your order for new eyeglasses by choosing anti-scratch coating, additional UV blocking treatment or photochromic lenses that automatically darken whenever you encounter the sun.
Figuring Out Your Needs
Have a chat with your optician to see what they recommend in your specific case.
Share28 June 2018
I was diagnosed with type 2 diabetes ten years ago. Since my diagnosis, I have been committed to learning how to modify my lifestyle and adopt healthy practices, such as daily exercise and eating wholefoods, that help control my diabetes and improve my quality of life. I started this blog to connect with others living with this condition and to share what I've learned on my personal journey to better health. I also update the blog with the latest research and news relating to type 2 diabetes. If you have a specific question that's not been addressed in a blog post, feel free to send me an email.
