Glasses with bifocal and progressive lenses are used to correct age-related farsightedness. They allow you to provide clear vision at different distances. Such lenses combine vision correction both near and far.
What are bifocals?
They are prescribed for people who need vision correction simultaneously at different distances. Bifocals are convenient because they replace two pairs of glasses. They allow you to see into the distance, read and work with nearby objects. Bifocal lenses have two visual zones: a large and comfortable distance and a segment for reading. The close-distance zone is designed in such a way, that the pupil, when reading, falls clearly on its optical center. Between the two segments of the lens – for distance and for near, the transition is sharp, with clear boundaries.
The advantages of bifocal lenses
- The 2-in-1 lens provides vision correction for both nearsightedness and farsightedness.
- It’s an economical solution for correcting multiple levels of vision.
- They are relatively cheap, especially compared to progressive lenses.
The disadvantages of bifocal lenses
There is a distinct line and semi-circular shape of the near vision lens. The jump image when switching from far to near vision and back.
Best suited for:
- Anyone who already wears glasses and needs reading glasses.
- Those who need vision correction at a reasonable price.
- For those who need reading glasses but don't want to buy and wear a second pair.
What are progressive lenses?
Progressive lenses are usually the answer to the problems associated with bifocals. They help solve farsightedness, nearsightedness, and middle-range problems, without distracting transition. The top of the lens improves long-distance vision and then moves towards improved near vision as you lower the lens.
The advantages of progressive lenses
- The 3-in-1 lens provides near, intermediate, and far vision correction.
- Eliminates the need to switch between multiple pairs of glasses.
- No visible lines on the lens for a smooth transition between the 3 zones.
The disadvantages of progressive lenses
- The adaptation period required learning to use the three different areas of vision.
- New users may experience dizziness or nausea until they get used to them.
- Significantly more expensive than bifocal lenses.
Best suited for:
- Anyone who wants discrete vision correction at a distance, near, and everything in between.
- Those who want a smooth transition, with no visible lines in the lens.
- Someone who needs reading glasses but doesn't want to buy and wear a second pair.
How to adjust to progressive lenses
If you have never used progressive glasses, it may take some time to get used to progressive lenses. Over time, you will get used to them.
A few tips to help you adapt faster
- Turn your head instead of moving your eyes when you want to see something from above, below, or from the side.
- Try to turn your head to keep your eyes in the corridor of progression.
- Make sure you have the correct fit for your goggles. Again, it's all about getting the progression corridor in the right place.
- Don't go back to your old glasses – if you switch and wear bifocals every time you have vision problems, it will be harder for you to adapt and take much longer.
- Try looking at objects at different distances simultaneously – for example, look at a laptop screen and a picture on the wall simultaneously.
- Fix your vision at different distances, shifting your gaze from objects located close to ones far away, and fix your eyes.
Bifocal lenses will introduce you to multifocal lenses as cheaply as possible, while progressive lenses will give you significantly better performance. Provided you can get used to wearing them every day.
-400x300.jpg)
-400x300.jpg)
