What are the symptoms of cataracts?

Written by Hu Shu Fang
Ophthalmology
Updated on September 01, 2024
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Cataracts are caused by the clouding of the lens, leading to a decline in vision. Early symptoms include blurred vision, sometimes seeing black spots, and some patients report a significant decrease in vision in dim light, with both near and distant vision being unclear. As cataracts progress, the decline in vision becomes more pronounced, severely affecting the quality of life. Some patients with cataracts may also experience double vision, changes in color perception, and a significant decrease in vision, requiring surgical treatment.

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Written by Peng Xi Feng
Ophthalmology
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The main symptoms of cataracts

The main symptoms of cataracts include: First, a decline in vision, which is the most obvious and significant symptom of cataracts. Second, a decrease in contrast sensitivity, particularly noticeable at high spatial frequencies in cataract patients. Third, changes in refractive power. Nuclear cataracts lead to increased lens power due to an increase in the lens and refractive index, causing nuclear myopia. Fourth, monocular diplopia or polyopia due to uneven refractive power across different parts of the lens, similar to the effect of a prism, resulting in monocular diplopia or polyopia. Fifth, glare. Sixth, changes in color perception. Seventh, varying degrees of visual field defects.

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Written by Tao Yuan
Ophthalmology
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Can cataracts be treated with medication in the early stages?

Cataract is a common eye disease and is currently the leading cause of blindness. It often occurs in middle-aged and elderly people, patients with high myopia, and those with chronic inflammation in the eyes. Cataracts can cause a decline in vision, severely reducing the quality of life. In the early stages of cataract formation, it is possible to treat with medication, such as applying eye drops like benzylarginine and pinoxacin, which can delay and prevent the worsening of cataracts. However, it cannot reverse the vision decline caused by cataracts. If the vision decline caused by cataracts has severely affected normal life, work, and study, surgical treatment should be considered promptly. Only by removing the cloudy lens inside the eyeball and replacing it with a transparent artificial lens can vision be restored.

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Written by Peng Xi Feng
Ophthalmology
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How is a cataract formed?

Inside the eyeball, there is a relatively important transparent tissue called the lens. Clinically, clouding of the lens is referred to as cataracts. Many factors, such as aging, genetics, metabolic abnormalities like diabetes, trauma, radiation, poisoning, and local nutritional disorders, can lead to damage to the capsule of the lens, increasing its permeability and losing its barrier function, or causing metabolic disturbances in the lens. This can cause the proteins in the lens to denature, leading to cloudiness of the lens, which is known as cataracts. Under a slit lamp microscope, varying degrees of cloudiness in the lens can be observed.

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Written by Hu Shu Fang
Ophthalmology
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Postoperative Care for Cataract Surgery

Post-cataract surgery, it is crucial to maintain eye hygiene. Patients must follow the doctor's orders, regularly use antibiotic eye drops to prevent eye infections, and avoid allowing bacteria to enter the eye and cause intraocular inflammation, a very frightening postoperative complication. If intraocular inflammation occurs, the eye will become red and painful, and vision will significantly decrease, necessitating emergency surgery. Therefore, patients should clean their hands, apply eye drops on time, avoid letting tap water enter the eye, and refrain from rubbing their eyes to prevent reopening the wound and bacterial invasion. After surgery, it is also important to keep bowel movements regular to avoid constipation, which can increase abdominal pressure and cause eye pain due to straining.

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Written by Li Zhen Dong
Ophthalmology
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Cataract ou, od, os means what?

OU, OD, and OS are common descriptions in ophthalmology. OU represents both eyes, OD represents the right eye, and OS represents the left eye. These are abbreviations. For example, visual acuity for both eyes is denoted as OU, visual acuity for the left eye as OS, and visual acuity for the right eye as OD. These terms are typically used in medical records, not only to describe conditions like cataracts. For instance, the condition of cataracts in both eyes would be described as OU: OD 0.1, OS 0.3.