People often find they are not very comfortable with progressive glasses at first. Some don’t know these are normal progressive glasses problems and feel panic. But a few days later, these problems disappear.
Why are there some progressive glasses problems in adjusting?
Most adaptation problems to progressive lenses are caused by one of the following:
• the specific brand of progressive lenses-in general, higher quality progressive brands such as EV4.0 and Varilux tend to offer better quality of vision and ease of adaptation.
• patient not understanding how to use the progressive lens and/or not allowing enough time for adaptation.
• frame adjustments are not correct for the individual or are different from previous glasses: (vertex distance, i.e. distance from eye to lens; face form wrap; pantoscopic tilt - tilt/angle of frame in relation to the face; frames too high or too low on nose).
• inaccurate placement of the optical center (segment/fitting height) of the lens-the segment/fitting height should be placed at the same spot as the patient's previous progressive lenses or for new wearers it should be exactly in the center of the pupil
• the wrong type of progressive lens design (soft design vs. hard/short corridor) for the patient's needs. See below for more explanation.
If you know what factors cause these progressive glasses problems, you can try to shorten the period of adjusting to progressive glasses. Patients must learn about progressive lenses so they can understand how to use them and what to expect.
Remember to point your nose directly at what you want to see. Then raise or lower your chin until the object comes into the best focus.
You may feel an initial difference in peripheral vision that will require some slight changes in horizontal head and eye movement. This will diminish with wearing time. Most people will adapt in a few hours although some can require as long as two weeks. If you are not adapted within two weeks you should return for a consultation with the optician that fitted your eyeglass frames to your face.
Now you have known progressive glasses problems in adjusting are not caused by doctor's prescription in most cases. Learn how to adjust to progressive glasses, then you will get used to them soon.

That progressive bifocal glasses are very popular among glasses wearers has become an undisputed fact. Plenty of people may be excited about their charming apperance and multi-fuctions, but wearing bifocal glasses should also be noticed, for there are many key points to be noticed about those glasses.

Good Opticians - most people will neglect this point, for they think all opticians are the same. The fact is, however, the prescribing of progressive bifocal glasses is much more complicated than other conventional glasses and is in need of great skills and knowledge. If the opticians are not will-experienced, they may make some mistakes on the prescription and the prescribed glasses can not meet wearers' demands. And the wearers have to suffer a lot, both in time and health.

Maintenance - this point was reemphasized on and on in the past. But now many people have forgotten it, for they think now that many new achievements are scored in frames, lenses, etc. less maintenance is needed. This is a great mistake. Anyway, good maintenance can help prolong the longevity of progressive bifocal glasses. For example, these glasses should be kept away from heat, humidity, strong radiation; the lens can not be rubbed by paper, buy special cotton clothing only; these glasses can not be put on the lenses directly, but on the arms. Anyway, nurturing good habits in maintaining glasses can cause less damage on these progressive bifocal glasses.

Age - this is often ignored by most people while buying glasses, for they think all people can wear them. However, people of particular age groups are not good candidates for some particular glasses. For example, some glasses are not suitable for school children. This is because their eyes are still in the growth. Luckily, progressive bifocal glasses are nice choice for children and people of other age group. Anyway, be careful about this.

Adaptation - this is a hot topic about wearing progressive bifocal glasses. Almost all people will have to spend sometime to get used to those glasses. Generally, the young people will have much shorter adaptation period than the older ones, for their eye muscle have relatively stronger elasticity. And those who have worn other glasses for very long time will spend much longer time, for their eyes have adapted to those former glasses already. But there is still a bad news that some people can not get used to progressive bifocal glasses though the reasons are still unknown. Anyway, one more point should be noticed during adaptation that wearers should be very careful about their eyes and glasses while working, driving, walking, etc.

Anyone who wants to get more detailed information about those warnings, he is suggested to visit the websites of some eye care clubs.

Eye examination - it is true that eye examination should be an important part for all people. And this process is essential for those who want to wear progressive bifocal glasses. The reason is very simple- the eye doctor can make an analysis on the patient's eyes and get an idea about the prescription; whether people are good candidates for those glasses can also be detected through this process.

The above are some suggestions about buying and wearing progressive bifocal glasses. I hope that they may be helpful for new wearers or those who want to buy those glasses.

What are trifocal readers? You can tell some features of them according to their name. They have three lenses, so they cover three sections of sight: near, middle, and far.

Many people with presbyopia have trouble focusing on objects that are at an intermediate distance from their eyes. Trifocals fit this need. They have a third area in the lens, usually above the reading lens and below the distance lens, that corrects for those items that you need to view that are somewhat nearby.

Bifocals allow you to focus on items that are near and far . But they are not enough. Sice presbyopia creates difficulty focusing at all ranges., what about those items, such as your computer screen, that are in the middle? That can only been done by trifocal readers.

However, that you have presbyopia does not mean you needs trifocal readers. Whether you need them or not depends on the nature of your work. A person who spends a large amount of time looking at a computer screen, for example, is more likely to need the help of trifocals than someone who works construction or teaches for a living.

So if you are a presbyopia sufferer spending most of time before a computer, you can choose trifocal readers.