Progressive lenses are designed to provide clear vision at all distances, from near to far, in a single pair of glasses. However, they can be difficult to get used to, and some people find that they don't work for them. There are several reasons why progressive lenses might not work, including:Improper eyeglass prescription
The most common reason why progressive lenses don't work is because the eyeglass prescription is incorrect. When you get progressive lenses, your eye doctor will measure your vision at multiple distances, including near, intermediate, and far. These measurements are used to create a custom prescription for your progressive lenses. If your prescription is incorrect, you may experience blurry vision, headaches, or other problems.
1. Inaccurate eyeglass prescription
Inaccurate eyeglass prescription is one of the main reasons why progressive lenses cannot be used to their full potential. In order to use progressive lenses smoothly, it is necessary to measure the near vision (nearsightedness) and far vision (farsightedness) correctly. And the value that cannot be missed for progressive lenses is the parameter value (Parameter).
What are parameters and why are they important?
Each individual's facial structure is different. Some people have small faces, while others have large faces. The position of the eyes, nose, and ears also varies. This results in different degrees of eyewear wear. The degrees of facial structure, frame, and lenses used are all interrelated. The parameter value measures four values as follows:
- Wrap angle: The curvature of the frame.
- Pantoscopic: The angle of the frame when worn.
- Vertex distance: The distance from the lens to the cornea.
- Naso-pupilarity: The distance from the nose to the cornea.
If any of these values are incorrect, the progressive lenses will not fit and will be uncomfortable to wear.
2. Incompatible lens design
Incompatible lens design is another reason why progressive lenses cannot be used to their full potential. This is because the lens design needs to be tailored to the wearer's individual needs, including their vision prescription, lifestyle, and activities.
For example, if a wearer has a strong prescription for nearsightedness, they will need a progressive lens that has a strong near correction. If a wearer spends a lot of time looking at a computer screen, they will need a progressive lens that is designed for computer use.
It is important to choose a progressive lens that is designed for your individual needs. This will help to ensure that you can see clearly and comfortably.
Lack of adaptation
Lack of adaptation is another reason why progressive lenses cannot be used to their full potential. This is because it takes time for the wearer's brain to learn how to use progressive lenses effectively.
Progressive lenses have a gradual change in power from near to far. This can be difficult for the brain to adjust to at first. It can take up to several weeks for the brain to learn how to focus on different distances through the progressive lenses.
If you are new to progressive lenses, it is important to be patient and give yourself time to adjust. Start by wearing your progressive lenses for short periods of time at a time. Gradually increase the amount of time you wear them as you get used to them.
It is also helpful to practice looking through the progressive lenses. When you are first starting out, it is helpful to focus on one distance at a time. For example, if you are reading, focus on the book and ignore the distance beyond it.
If you are having trouble adapting to your progressive lenses, talk to your eye doctor. They may be able to offer you tips or exercises to help you adjust.