Different types of Lenses
Before starting about the various types of lenses, you will notice a term of presbyopic. Basically, this is a type of eye disorder that causes the eyes to have a hard time on focusing on objects that are close due to the lens’s rigidity. This is a disorder that makes it quite hard to work on a computer and read. Presbyopia will often start during the early 40s, but it actually varies, and it is dependent on the person. Those who have this will start to hold what they are reading farther from them in order to be able to focus on it much better. Eventually, this will no longer work and will cause that person to need progressive lenses, bifocals, and even reading glasses.
Sunglasses and UV Protection
Having UV protection is very important every single time that you step outside. A lot of people will apply sunscreen, but often times people forget that having the right type of UV protection for their eyes is just as important. The protection is not based on how dark the lenses are, but it is all based on how well it can block out certain types of wavelengths of those sun rays. The best protection will come from 400nm of UVA as well as UVB protection. This is the best in order to help prevent progression of eye conditions like cataracts and even macular degeneration. Getting polarized lenses can even provide more benefits by cutting down glaring and filtering out certain light rays. They help to enhance vision, and then decrease eyestrain and are perfect for outdoor use.
These types of lenses contain aides for two types of vision ranges. It works with distance and near. The lenses will have a distinct area that is located at the bottom of the lens which will allow a person to have reading vision up to 20 inches away. The lenses are usually for those who have presbyopia who need to have near vision and distance vision correction and don’t mind the demarcation lines.
These are also known as photochromic lenses. They will darken based on the amount of UV rays that hits the lens. They will be clear while indoors and will then darken while outside. It is important to know that they do not darken within a vehicle because windshields are made to block UV light. They offer protection from UV light and sun in a single pair of glasses.
These were designed to allow people to have near vision, distance vision and intermediate vision correction in a single lens. They are best for those who don’t want to have those lines on their lenses. They also allow for a range of 36 inches which is better than bifocals. They are great for daily use and they also look the best.
These are for those who are constantly working on a computer and they are set for the best distance. These lenses have a computer prescription towards the top of the lens while the reading prescription is located at the bottom in the lens.