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What is cataract?

Close-up of an elderly woman's right eye

The human eye is likened to a camera, but the lens of the camera is the crystalline lens.

The crystalline lens is in the shape of a convex lens with a diameter of 9 mm and a thickness of 4 mm, and is wrapped in a membrane (sac). The anterior surface of this membrane is called the "anterior capsule" and the posterior surface is called the "posterior capsule".

On the other hand, the content of the crystalline lens is a transparent tissue composed of protein and water, and is divided into a "cortex" and a "nucleus".

A normal crystalline lens is transparent and allows light to pass through well. However, the proteins inside the crystalline lens may be denatured and become cloudy due to various causes.

This is "cataract".

When the crystalline lens becomes cloudy, light cannot pass through well, or light is diffusely reflected and a clear image cannot be formed on the retina, resulting in poor eyesight.

Causes of cataracts

Cataracts Cataracts can be caused by a variety of causes, most often due to aging, which we call "age-related cataracts." There are individual differences, but as everyone gets older, the crystalline lens becomes cloudy.

Age-related cataract is a kind of aging phenomenon, so it occurs more often in older people.

Recently, the incidence of young people is increasing as complications such as atopic dermatitis and diabetes.

In addition, there are cases in which cataracts are born due to infection with rubella in the mother's body, and cataracts may occur due to eye injuries or side effects of drugs.

Causes → Types

of cataracts Aging → Age-related cataracts

Atopic dermatitis, diabetes, etc. → Cataracts and rash associated with systemic diseases

→ Congenital cataracts

Eye injuries, etc. → Traumatic cataracts,

, etc.


・ Hazy appearance

・ Dazzling, difficult to see in bright places

・ Temporarily difficult to see near, glasses do not fit

・ In cataracts that look double or triple,

the crystal body in the eye becomes cloudy and the eyesight deteriorates To do.

Symptoms vary because each person has a different turbidity in the crystalline lens.

The main symptom is "blurred eyes". Also, cataracts alone do not cause pain or redness.

The turbidity and symptoms

of the crystalline lens are different for each person, but turbidity often starts from the peripheral part (cortex) of the crystalline lens, and if the central part (nucleus) is transparent, the eyesight does not deteriorate.

When the turbidity spreads to the center, it becomes dazzling and the eyes become hazy.

When it begins to become cloudy from the center (nucleus), it may "temporarily make it easier to see near", and then the eyes become hazy.

Cataract Treatment and Surgical

Situation where an elderly woman examines her left eye


Eye drops and oral medications can slow the progression of cataracts, as long as they do not interfere with daily activities.

These drugs slow the lens cloudiness and do not improve symptoms or restore vision.

If the cataract progresses and you feel inconvenienced in your daily life, surgery is done.

If you have a disease other than cataract, devise a surgical method or determine the timing of surgery based on your general condition.

Surgery Before

surgery for cataracts, we do a variety of tests to find out if the surgery works and to choose the right intraocular lens for your eyes.

Since the intraocular lens is fixed in one place, it is important to consult with a doctor before surgery to select the power that suits your lifestyle.

Hospitalization period and one-day surgery

Generally, you will be hospitalized for about 3 to 4 days including post-surgery management. Recently, some facilities carry out one-day surgery if there is no problem with the patient's general condition or going to the

hospital after surgery.

One-day surgery has some conditions for the doctor and the patient to be operated on.

Conditions for patients undergoing one-day surgery

・People who can go to the hospital

・People who

・Do not have serious complications-People who

・Can obtain the cooperation of their families

Cataract surgery

Currently, cataract surgery is mainly performed by crushing the cloudy crystalline lens with ultrasound. , It is done by inserting an artificial lens (intraocular lens).

If the cataract progresses and the nucleus becomes stiff, the entire nucleus of the lens may be removed.

Cataract surgery and immediately after curing

Eyes may become red after

In addition, symptoms such as rough eyes, tears, and blurred eyes may occur, but these symptoms subside within a few days to 1 to 2 weeks.

For 1 to 3 months after surgery, use eye drops as directed by your doctor to control the inflammation caused by the surgery and prevent infection.

You can use your eyes the day after surgery or without getting tired.

Depending on how you see it after surgery, you may feel a sense of discomfort or glare in the color tone.

You will gradually get used to the discomfort in color tones, but if you continue to have glare, we recommend using colored glasses to relieve the symptoms.

You can return to work early, but it depends on the patient's general condition and type of work, so please consult your doctor.

Regular checkups after surgery will continue for some time.

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