Take out a note and place it where you can see it best
Then focus on the small print on the banknote
Look away from the banknote and look at an object 2 to 3 meters away for about 5 seconds
Then look back at the small print and see if you can read the small print in a few seconds
Being able to focus within 1 second is normal; More than 1 second is at risk of presbyopia; More than 3 seconds can basically determine that there is presbyopia.
老花眼症狀檢查
When looking at the subject, I want to take off my glasses, but I can see more clearly without glasses
Feel that your home or office is darker than before
Presbyopia is an age-related phenomenon of natural aging that is caused by the deterioration of the ciliary muscle of the eye and the aging of the lens. Presbyopia can make it difficult to focus on close objects, resulting in blurry images, especially when reading with your phone or newspaper away from you. In addition, the presbyopia will continue to deteriorate with age, so if you want to have clear vision, you must wear reading glasses or seek other vision correction solutions from your doctor.
How to identify presbyopia?
Presbyopia usually begins around the age of 40 and can continue to worsen with age. Here are some early presbyopia symptoms:
When reading, you need to zoom in or hold the text a little farther away to see it clearly
It is difficult to focus when reading, and it is easy to feel headaches
Eyes tend to feel tired and sore
When looking at near objects immediately after looking at a distance, the focus will slow down
People who are nearsighted begin to feel that they can see clearly without glasses
It's hard to see in dimly lit places
Although there is currently no cure for presbyopia, there are several options to correct vision, such as wearing reading glasses, presbyopia, laser correction or surgery. If you notice that you are starting to experience any of the above symptoms, it is advisable to seek an eye doctor for an examination, who will usually confirm the diagnosis through an eye test and presbyopia measurement, and then recommend the appropriate correction method.
How to calculate the degree of presbyopia
The degree of presbyopia is generally measured by the English letter "D" (Diopter, degree), for example, +1.00D, that is, the degree of presbyopia is 100 degrees. Assuming you don't have myopia, farsightedness or other vision problems, the average person will start to develop presbyopia of about 100 degrees at the age of 40, and then the presbyopia will increase by an average of 10 degrees per year, and the prescription will gradually slow down after the age of 60.
Comparison table of age and presbyopia
age
Presbyopia degree
40歲
+1.00D
50歲
+2.00D
60歲
+3.00D
After the age of 60
The power slows down
The above presbyopia prescription table is only a rough reference, the actual situation varies from individual to individual, it is recommended that you seek an ophthalmologist for an eye examination, and obtain the exact presbyopia prescription before buying the right reading glasses.
Can myopia and presbyopia cancel each other out?
Myopia and presbyopia are two different vision problems with different causes. Myopia is caused by a refractive error in the eye, which makes it difficult to see distant objects, while presbyopia is a deterioration of the ciliary muscles and lenses, resulting in blurred images when looking at near objects. However, people who have both myopia and presbyopia can see near things clearly without glasses at a certain age, because the degree of myopia is exactly the same as the increase in presbyopia, so they may mistakenly think that they do not have presbyopia.
Still, myopia and presbyopia do not cancel each other out, as myopia does not decrease with age. People with both myopia and presbyopia do not need glasses to see near objects, but they still need glasses to see things that are far away. Therefore, once you notice presbyopia, you need to consider changing glasses with multifocal lenses or seek other methods of vision correction from a professional ophthalmologist.
How to choose reading glasses?
Once presbyopia is detected, the most convenient solution is to wear reading glasses. Although the prescription will still deepen after wearing reading glasses, this can greatly reduce the level of eye fatigue and reduce the burden of seeing near objects.
In addition, some people may buy reading glasses on their own, but each person's reading power may be slightly different, and some people may also have myopia or farsightedness, and wearing glasses with inappropriate prescription will only cause discomfort.
In terms of lens selection, there are two options on the market: monofocal lenses and progressive lenses. Monofocal reading lenses can only see objects at a fixed distance and are only worn when you need to see near objects. For people with nearsightedness or farsightedness, it is necessary to change glasses with different functions frequently. Progressive lenses, on the other hand, allow you to see objects at far, medium and near distances at the same time, but these lenses are designed to be more specific and need to adapt to time.
If you find it inconvenient to wear traditional reading glasses, or if you are not suitable for wearing glasses for work reasons, you can also consider presbyopia progressive con. It should be noted that compared to traditional reading glasses, reading con with the eyeball needs to be used in strict accordance with the doctor's instructions, especially in the maintenance and cleaning of presbyopia, to avoid bacterial infection or other eye health problems.
Presbymax presbyopia laser vision correction surgery
In addition to wearing reading glasses or reading glasses, there is also a Presbymax presbyopia laser surgery that can solve vision problems such as presbyopia and myopia at one time, allowing you to completely abandon reading glasses.
Presbymax is indicated for presbyopia patients aged 40 to 60 years without cataracts. The doctor will use a laser to polish the cornea to change the curvature, and correct myopia, farsightedness, and astigmatism to close to 0 degrees in the main eye, so as to see long-distance images. The other eye reserves or creates about 150 to 250 degrees of myopia for viewing close-up images and counteracting presbyopia, and a slight spherical aberration is added to increase the depth of field of both eyes, extend the focus, and change the chromatic aberration, thus creating a 'fusion zone' for both eyes. This not only makes the far, medium and near distances clear, but also does not affect the original color and three-dimensional sensitivity, and there will be no glare problem.
In addition, the surgery can be completed in as fast as 10 minutes, safely and without discomfort, most people can return to normal activities within 24 hours after surgery, and perfect vision can be restored within a few weeks, which is suitable for most presbyopia patients.
Whether you choose reading glasses, presbyopia, or orthopedic surgery, you should choose according to your lifestyle and seek the advice of a medical professional.
FAQ
How many degrees is presbyopia serious?
The severity of presbyopia usually depends on the degree. Generally speaking, the higher the presbyopia degree, the more pronounced the effect. But everyone's situation is different, some people may be bothered by only a slight presbyopia, while others may need a higher number of glasses to achieve noticeable improvement.
Does the presbyopia increase?
As we age, the presbyopia usually increases gradually and does not become lighter, and if you suddenly feel that your presbyopia is getting better, it may be a sign of cataracts. Therefore, doctors generally recommend that patients with presbyopia have regular eye checks and change their glasses when necessary to cope with changes in presbyopia.
How to choose the prescription of reading glasses?
The prescription of reading glasses should be determined based on the results of your eye examination and the doctor's recommendation. An eye professional will help you measure your presbyopia and help you choose the best glasses for your needs. Remember to check regularly to make sure your prescription is still suitable for your needs.
Regardless of the degree of presbyopia, early identification and wearing the right reading glasses is essential to maintain good vision and quality of life. It is recommended that everyone must have regular eye check-ups to ensure your eye health and vision condition.
High myopia itself does not directly cause serious harm to vision, as there are a variety of ways to help improve myopia. However, the formation of high myopia is due to changes in the structure of the eyeball, so even if vision is improved using other methods, it is still necessary to face a series of complications that can lead to deep myopia, such as cataracts, retinal perforation and even peeling, glaucoma, etc.
If left untreated, these problems can lead to permanent blindness. Therefore, people with high myopia need to have an in-depth understanding of these potential risks and have regular eye exams to ensure healthy vision and deal with any issues promptly.
Definition of high myopia
High myopia is a relatively severe level of myopia. Myopia of 600 degrees or more, medically defined as high myopia. Its formation is associated with changes in the length of the eyeball.
The normal length range of an adult eyeball is 22-27mm. If the length of the eyeball is greater than 27mm, it will cause high myopia. In almost all cases, genetics play a role in the development of high myopia. If both parents are nearsighted, then their child also has a greater chance of developing high myopia.
Complications of high myopia
High myopia itself usually does not cause vision loss. However, people with this condition are more likely to develop several other sight-threatening diseases.
Retinal perforation or even detachment
The retina is the imaging site of the eye, located in the inner layer of the eyeball wall, and is a transparent film. The retina of people with high myopia will be more fragile than that of normal people, because the retina will be stretched and thinned after the eyeball becomes longer, and the retina will be more prone to perforation or rupture after thinning, and retinal detachment may occur in severe cases.
Glaucoma
Glaucoma is an eye disease in which the optic nerve is damaged due to abnormal pressure in the eyeball due to excessive or inability to drain fluid from the eyeball. In people with high myopia, the eyeball is too long, so the optic nerve or supporting tissues and blood vessels inside the eye are under more pressure, which leads to changes in intraocular pressure and the formation of glaucoma.
Cataract
People with high myopia are more likely to develop cataracts than the general population because the structure of the eye has changed, which may increase the burden on the lens, which in turn will lead to accelerated aging of the lens and the formation of cataracts.
Macular lesions and bleeding
Because of the long axis of the eye, there may be cracks in the basement membrane of cells below the macula of the retina in people with high myopia. Due to the body's self-healing function, new blood vessels grow from the choroid to the retina. In addition to occupying the photoreceptor cell layer and affecting the central visual field, these new blood vessels are susceptible to damage and cause bleeding, blood clots, and scar tissue, which can affect central vision.
Floaters
There are two main causes of floaters caused by high myopia. In the case of high myopia, the eye will age at an accelerated rate, which can lead to changes in the structure of the fibers inside the vitreous humor, and when light enters the eye, these fibers are projected onto the retina, like a mosquito floating in the eye.
Another cause is retinal detachment or tear caused by high myopia, which leads to the appearance of floaters.
High myopia test
Ophthalmologists will recommend patients with high myopia to undergo a comprehensive eye examination once or twice a year, and once symptoms are found, they can be treated immediately, making it less difficult to treat.
In the examination of high myopia, the ophthalmologist usually performs the following tests depending on the individual's situation:
Visual acuity test: An eye test is the most common eye test and is used to determine if the eye power is stable.
Fundus examination: Fundus examination will use color fundus photography to check for lesions or abnormalities in the optic nerve, blood vessels, retina, vitreous, etc.
Intraocular pressure and visual field test: Intraocular pressure and visual field test can assess whether you are at risk of developing glaucoma, and if signs are found during the examination, the doctor can treat it before it affects your vision.
Ocular CT: Ocular CT is an optical coherence tomography (OCT) that can help detect macular lesions early.
Slit-lamp examination: The doctor can clearly observe the eyelids, conjunctiva, sclera, cornea, anterior chamber, iris, pupil, lens and anterior 1/3 of the vitreous through the slit-lamp microscope, and can determine the location, nature, size and depth of the lesion.
Regular eye exams can detect any underlying eye problems early and prompt appropriate treatment measures to ensure healthy vision.
Even if laser vision correction surgery reduces the degree of high myopia, complications cannot be avoided
In recent years, some patients with high myopia have undergone laser vision correction surgery, and their myopia has decreased, so they have forgotten to continue to pay attention to the problems that may be caused by high myopia. But in fact, laser correction only changes the curvature of the cornea, not the length of the eyeball. Therefore, all complications arising from the length of the eyeball will not be reduced by LAIS!
High myopia causes cataracts to deepen rapidly
In a recent study of cataracts and cataract surgical outcomes for high myopia, researchers found that cataracts in highly myopic eyes occurred more quickly compared to normal eyes. In addition, there is a higher prevalence of comorbid diseases and complications (e.g., retinal detachment) in the eye with high myopia.
Therefore, people with high myopia must have a routine eye exam so that their ophthalmologist can monitor the health of their eyes and look for these symptoms as well as signs of other complications of severe myopia.
