Cataracts are an eye disease caused by the clouding of the lens of the eye, affecting vision, such as blurred vision, double vision, or seeing images with a yellow tint. However, it usually does not cause any pain or irritation in the eyes.
Cataracts can occur in both eyes at the same time or in only one eye, but cannot spread from one eye to the other.
Symptoms of cataracts
Cataracts are a disease that gradually shows symptoms over a period of many years. In the beginning, it usually does not cause any abnormal symptoms. ทางเข้า UFABET สำหรับสมาชิกใหม่ สมัครวันนี้ รับโบนัสฟรี But as time goes by, people with cataracts often experience the following symptoms:
- Blurred or blurry vision
- More light is required for reading or other activities that require visual attention.
- The eyes can see better in dim light than in bright light. They are sensitive to bright light.
- Seeing double images
- The image looks yellow or faded.
- Seen as a ring around a light or bulb
- Patients may mistake blurriness for a vision problem, such as nearsightedness , and may need to change glasses or contact lenses frequently.
Causes of cataracts
Normally, the lens of the human eye is clear and mostly composed of water and protein. These proteins are arranged in an orderly manner to allow light to pass through the lens. However, certain factors cause protein to accumulate in groups in the lens, causing the lens to become increasingly cloudy. Possible causes include:
Age–related cataract
Aging is the most common cause of cataracts, as the structure of the cornea changes over time.
Congenital cataract
Babies can have cataracts from birth. This can be caused by many factors, including genetics, infection, injury or poor development during the womb. Babies that are often found to have congenital cataracts include babies with galactosemia, rubella and type 2 patellar luxation.
In addition, some young children may show symptoms later in life, often bilaterally. Sometimes the cataracts are so small that they do not affect vision, but when they are found to be affecting vision, they are surgically removed.
Secondary cataract
Other eye surgery treatments can also cause cataracts, such as glaucoma , uveitis, and eye inflammation. In addition, people with diabetes, obesity, or high blood pressure , or taking certain medications, such as steroids and some diuretics, are also risk factors that make it easier for them to develop cataracts.
Traumatic cataract
Trauma to the eyes, whether surgical or non-surgical, can also lead to the development of cataracts later in life.
In addition, cataracts may be caused by many factors, such as family members having a history of this disease, eating foods that are not rich in vitamins, being exposed to sunlight for a long time in daily life, smoking, or drinking alcoholic beverages regularly.