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Cataract
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.
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.
Is cataract easy to treat?
If you are diagnosed with cataracts, we generally use surgical methods nowadays. Our surgical approach typically involves cataract phacoemulsification combined with the implantation of an artificial lens. If you have a simple case of cataracts without any other eye diseases—such as glaucoma, diabetic retinopathy, hypertensive retinopathy, or central retinal vein occlusion—the outcome after surgery is generally good. As for the eye drops for treating cataracts advertised on TV, like Sharp Eye Love, their effectiveness is not very certain in our medical practice. Currently, the main method of treating cataracts is still through surgery.
Causes of cataracts
Various causes, such as aging, genetics, local nutritional disorders, immune and metabolic abnormalities, trauma, poisoning, radiation, etc., can lead to metabolic disorders of the lens, causing the denaturation of lens proteins and resulting in cloudiness; this is called cataract. Cataracts can be divided into congenital and acquired. Congenital cataracts, also known as developmental cataracts, are divided into anterior polar cataracts, posterior polar cataracts, nuclear cataracts, and total cataracts. Acquired cataracts are divided into senile cataracts, complicated cataracts, traumatic cataracts, metabolic cataracts, radiation cataracts, and those related to medications and poisoning.
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.
Consequences of not undergoing cataract surgery
First, it is important to understand what cataracts are. Cataracts are the clouding of the lens cortex, which commonly refers to the gradual whitening of the central pupil area, the black part of the eye. Cataracts, based on their stage of development, are divided into early, middle, and late stages. In the early stage of cataract, the vision is slightly impaired. In the middle stage, the cortex becomes moderately clouded, and vision might still be around 0.4 or 0.5. In the late stage, the cataract is severely matured, generally with vision lower than 0.3. Cataract in its early and middle stages might not necessarily require immediate surgery. However, in late stages, when vision drops below 0.3, surgery should be considered. If not treated surgically, the mature cataract can completely block light, progressively decreasing vision and eventually leading to blindness. Therefore, it is advisable to consider surgical treatment for cataracts in the late stage.
Symptoms of cataracts
The symptoms of cataracts are diverse. Firstly, the most primary manifestation is a decline in vision, which is a painless and gradual decrease. Unlike glaucoma, where the decrease in vision is accompanied by swelling pain in the eyes and even headaches, the vision decrease in cataracts occurs gradually and not suddenly. If the onset is sudden, then it is generally not considered to be caused by cataracts. Besides the painless, gradual decline in vision, some patients may experience a decrease in contrast sensitivity, and changes in refraction. For example, patients who have presbyopia might find that their presbyopia diminishes and their nearsightedness worsens if they develop cataracts, particularly nuclear cataracts. Some people may experience monocular diplopia or polyopia, as well as varying degrees of visual field defects.
Cataracts are a condition of the eye.
Cataracts are degenerative changes causing a decline in optical quality, which are due to the decreased transparency or color change of a structure in the eye called the lens. The pathogenesis of cataracts is quite complex, resulting from the long-term combined effects of various internal and external factors on the lens. The lens is situated in the fluid environment of the eye, and any factor impacting this environment, such as aging, genetics, metabolic abnormalities, trauma, radiation, poisoning, localized nutritional disorders, as well as certain systemic metabolic or immune diseases, can directly or indirectly damage the tissue structure of the lens, interfere with its normal metabolism, and cause the lens to become opaque.
What department should I go to for cataracts?
The department for cataract consultations is ophthalmology. Various factors such as aging, genetics, local nutritional disorders, immune and metabolic abnormalities, trauma, poisoning, radiation, etc., can cause metabolic disturbances in the lens, leading to the denaturation of lens proteins and resulting in opacity, known as cataracts. At this time, light is obstructed by the cloudy lens and cannot be projected onto the retina, causing blurred vision. This condition is commonly seen in individuals over forty years old, and the incidence increases with age. The disease can also be divided into congenital cataracts and acquired cataracts.
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.