Cataract A cataract is a clouding of the clear lens of your eye because of degeneration of protein inside.

What is Cataract?

A cataract is a clouding of the clear lens of your eye because of degeneration of protein inside. The cloudiness leads to low visual acuity and be unable to focus into images on retina clearly. Most cataracts develop slowly and don’t disturb your eyesight so soon. However with time, cataracts will eventually interfere with your vision.

Types of cataracts

Congenital cataract

Lenses in your eyes are naturally cloudy.

Age-related cataract

One of the types of cataract develops by aging.

Diabetic cataract

Diabetic cataract is related to high blood sugar, a material called sorbitol accumulates in your lens and it makes your vision cloudy.

Skin disease cataract

As complication of atopic dermatitis, lenses become cloudy.

Corticosteroid cataract

Caused by long-time use of steroid medication.

Traumatic cataract

Caused by external eye wound.

Secondary cataract

After surgery of cataract, the cloudiness develops at posterior capsule of the lens.

Cataract symptoms

Clouding of the clear lens of your eye, you will recognize following symptoms;

Cataract itself doesn’t cause pains, foreign object sensation or inflammations.

The causes of cataract

Most cataracts develop by aging. Also, ultraviolet rays contribute to the development of cataract in daily life.
Some are related to injury, atopic dermatitis, diabetes and malnutrition, which can cause cataract to develop to younger generation. If you have experiences of eye surgery, it can increase your risk of this disease.

Prevention for Cataract

Several strategies may be helpful, including :

  1. Visual Acuity Test
    This test will find the "best corrected vision" for any visual problems. We measure influence of cataract.
  2. Slit lump examination
    The ophthalmologist will examine the cornea, iris, lens and the anterior chamber. This test can help to determine muddy of your eyes.
  3. Mydriasis examination
    To check any abnormalities of your eye grand

How to treat cataract?

We will treat light cataract with eye drops or oral medicine. If your eyes become muddy, you would not be able to recover clear eyesight. So only way to treat cataract is surgery.

Cataract surgery

The only way to cure cataract is surgery. This surgery is a procedure to remove the lens of your eye and, in most cases, replace it with an artificial lens. This is used to treat the clouding of the normally clear lens of your eye (cataract).
In the case you don’t have any problem besides lens, this surgery will help you improving your view ability.

We do this surgery with anesthetic eyedrop. It takes about 15 minutes to finish and no necessary to admission to the hospital. Please contact us to appoint specialty outpatient.

In general, phacoemulsification and aspiration procedure is used in these days cataract surgery. This method is quite safe way of cataract surgery because the operation wound is extremely small (2-3mm). You can see clearly after surgery and able to return to your job smoothly.

Office hours






(no lunchtime.)


Our clinic is closed on 12/31, 1/1, 1/2, 1/3.


9th floor of Hulic Shinjuku Building,3-25-1, Shinjuku, Shinjuku-ku, Tokyo, 160-0022






Contact us

Online reservation


Doctor career

Director:Yasuhiro Shinkawa

(A board-certified ophthalmologist)


Japan Ophthalmological Society
Japanese Retina and Vitreous Society
Japanese Society of Ophthalmic Surgeons

Certification of Completion

Course of Ophthalmic PDT Study Group
Number of cataract surgery up to the present:About 3000


2001 Graduate-Medical Department of Kumamoto University
2002 Department of Ophthalmology Kyoto University School of medicine
2002 Shimada Municipal Hospital
2008 Japanese Red Cross Society
2010 Kitano Hospital The Tazuke Kofukai Medical Research Institute
2014 Shinjuku-Higashiguchi Eye Clinic


The eye clinic is the place where the patients, who have vision problems, can recover their eye function and feel how great ''I CAN SEE THINGS' 'is. When we share something impressive with the patients, we feel the happiest.
We’ll continue seeing the patients sincerely.
Thank you very much.

We have 1 full-time service orthoptist, 5 part-time orthoptists, 1 full-time nurse and 3 part-time nurses in our clinic.
Another several ophthalmologists are working here.