Cataract is what?

Written by Peng Xi Feng
Ophthalmology
Updated on September 03, 2024
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All sorts of reasons, such as aging, genetics, local nutritional disorders, immune and metabolic abnormalities, trauma, poisoning, radiation, etc., can cause metabolic disorders in the lens, leading to the denaturation of the lens proteins and resulting in opacity known as cataract. At this point, the light is obstructed by the opaque lens and cannot be projected onto the retina, causing blurred vision. It is commonly seen in people over the age of forty, and the incidence increases with age. This disease can be divided into congenital cataracts and acquired cataracts. Congenital cataracts are also known as developmental cataracts, and there are six types of acquired cataracts.

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Written by Wang Hui Zhen
Ophthalmology
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What are the early symptoms of cataract?

Early symptoms of cataracts are not obvious in some patients, while others may experience mild blurriness of vision. As the lens becomes cloudier, the blurriness will gradually worsen, and symptoms such as nearsightedness, glare, and double vision may also appear. In advanced stages, some may develop glaucoma, leading to symptoms like eye pain, headache, nausea, and vomiting, and in severe cases, it can cause blindness. Cataracts are a common and prevalent eye disease and are the leading cause of blindness worldwide. The lens, an important optical component of the human eye, is normally transparent. Cataracts can form due to various reasons leading to protein degeneration in the lens, causing it to become cloudy and result in various degrees of vision loss. It is recommended that patients with cataracts regularly visit ophthalmologists and consider cataract removal surgery if necessary.

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Written by Hu Shu Fang
Ophthalmology
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Does cataract cause headache?

The main symptoms of cataracts include a decline in vision, with both near and far objects appearing unclear, and blurry vision. There is no significant eye pain or headaches, nor does it cause redness in the eyes. If headaches do occur, it is important to investigate the cause, such as checking if there is an increase in eye pressure or if the headache is caused by glaucoma, and to treat according to the specific cause. However, in the later stages or over-mature stage of cataracts, the lens may dissolve, which can potentially lead to phacolytic glaucoma, but this condition is very rare.

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Written by Li Min
Ophthalmology
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Does cataract spread by contagion?

Firstly, cataracts are the clouding of the lens inside our eyes, known as cataracts. Cataracts are not contagious. Based on the cause, cataracts can be classified into age-related cataracts (previously referred to as senile cataracts), metabolic cataracts, secondary cataracts, traumatic cataracts, and radiation cataracts. The most common type in clinical settings is age-related cataracts, which are commonly seen in middle-aged and elderly individuals over fifty years old. Its clinical presentation is a painless, gradual decline in vision. Currently, the only effective treatment is surgical intervention.

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Written by Hu Shu Fang
Ophthalmology
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What causes cataracts?

There are many factors that cause cataracts, the most common being age-related cataracts. As we age, we are exposed to ultraviolet rays which can cause degeneration of the lens. The older a person is, the more ultraviolet rays they absorb. Some cataracts are also caused by medications, such as long-term use of steroids. Additionally, some cataracts are caused by trauma; if the lens is accidentally punctured during an injury, it can rapidly deteriorate. There are also congenital cataracts caused by intrauterine infections. The causes are various, and in diabetic patients, their cataracts can progress more quickly because high blood sugar can lead to changes in the osmotic pressure of the lens.

doctor image
home-news-image
Written by Peng Xi Feng
Ophthalmology
48sec home-news-image

Cataract is what?

All sorts of reasons, such as aging, genetics, local nutritional disorders, immune and metabolic abnormalities, trauma, poisoning, radiation, etc., can cause metabolic disorders in the lens, leading to the denaturation of the lens proteins and resulting in opacity known as cataract. At this point, the light is obstructed by the opaque lens and cannot be projected onto the retina, causing blurred vision. It is commonly seen in people over the age of forty, and the incidence increases with age. This disease can be divided into congenital cataracts and acquired cataracts. Congenital cataracts are also known as developmental cataracts, and there are six types of acquired cataracts.