Hyperopia is cause by the eyeball being shorter than the focal length of the lens and weakness of the ciliary muscles. The image of distant objects is focus behind the retina, causing the image to appear blurry. People with hyperopia often have trouble reading or doing near work. They often experience eye pain, headaches, and amblyopia. Presbyopia is most common in adults over the age of 40.
In addition, symptoms of congenital hyperopia that can occur at any age, such as
- Before school age : When young children get older and need to use their eye muscles more than usual to focus, แทงบอล UFABET ราคาดีที่สุด ไม่มีขั้นต่ำ, other abnormalities may occur, such as squinting when looking at things up close or when reading.
- School age : This is the age where vision symptoms start to show more clearly. Children will start to see unclearly at close range, but their vision at far distances is still clear. One way that parents can observe this is that children with farsightedness will not be able to read for long periods of time.
- Working age: It is consider the age where age starts to increase. Eye muscles and optic nerves start to deteriorate. When working or focusing eyes at close range for a long time, eye fatigue starts to occur earlier than other people.
And presbyopia is cause by the natural deterioration of the body as we age. The main causes are:
- Weakened muscles around the eyes: The muscles that help adjust the focus of the eye lens do not work as well as before, resulting in poor near vision.
- Changes in the internal structure of the eye: Lens, other parts of the eye also change with age. These changes in the internal structure of the eye can affect the ability to see.
- Degeneration of the lens of the eye: When you are around 40 years old and above, the lens of the eye will gradually harden and lose its elasticity, making it more difficult for the eye to adjust its focus at close range.
Finally, presbyopia is a natural degenerative process that occurs in everyone and cannot be prevent. It can be correct by wearing eyeglasses to improve clear vision.