Presbyopia in the elderly is a condition in which the ability to focus
That are close to decreases with age. It occurs because the lens becomes tighter and the muscles used for focusing become weaker. Symptoms usually start in people around the age of 40. It is normal for everyone to experience this condition. An easy way to observe presbyopia is that previously, you could read or write at a distance of 1 foot from your eyes and see clearly. But now you cannot see clearly. You have to move the book away, or some people may have to squint their eyes to help read books more clearly and see things up close more clearly. Some people may experience eye irritation, eye pain, or headaches. Because when they cannot see, they try to focus harder. Which is why they have the aforementioned symptoms.
Some people confuse the eyes of the elderly with farsightedness. In fact, this is not correct. It is true that both conditions can be corrected by using convex lenses. Which have the same positive power, but at different times. The eyes of the elderly use convex lenses only when looking at things up close, while farsightedness can occur at any age from birth. And the convex lenses used must be used all the time, both at a distance and near.
Treatment
There are many options for eyeglasses.
Each tailored to each person’s convenience and lifestyle. Specific eyeglasses for near vision
(Reading glasses) When looking far away, take off your glasses. Suitable for people who originally had normal vision, but not suitable for people who need to see both near and far at the same time or do not want to carry glasses.
Bifocal glasses: This type of glasses has a clear seam between the lenses. You can use the upper lens for distant vision and the lower lens for close vision. They are convenient, easy to use, and do not require much training. Everyone can use them, but some people may not like them because they are afraid that they will look older when they wear them.
Multifocal glasses (Progressive glasses) This type of glasses has different levels of lenses and decreases in order. Adjust the distance from far to near without any seams on the lenses. The advantage is that if you can use it, it is very convenient. You can see clearly at every distance. It is beautiful and looks good. But it is not suitable for everyone. It takes a long time to get used to it because when you look at the image, it may move. Looking at the side will be distorted, causing dizziness. You should not glance or glance because it will make you look at the side of the lens. You should turn your face to look straight ahead.
Contact lenses design to meet the needs of those who do not want to wear glasses.
The lenses have 2 focal points, but they still have many limitations. The magnification is still limited and difficult to use.
Mono Vision is suitable for those โปรโมชั่นพิเศษจาก UFABET สมัครตอนนี้ รับโบนัสทันที who do not want to use bifocals and progressive glasses. One lens will be made for distance vision and the other for near vision. However, there is a special technique that requires practice because it involves using the dominant eye better for distance vision and using the other for near vision. The disadvantage is that distance judgment is impaired because only one eye can be used at a time.