glaucoma/Glaucoma is a chronic disease that damages the optic nerve.

The causes of glaucoma

This disease gradually destroys nerve because of pressure increasing in the eye and, the damages bring your visual field narrow. This disease can destroy vision at worst.

What is intraocular pressure?

One of the factors of this disease is intraocular pressure increasing. intraocular pressure is the pressure of aqueous humor. It might change the level depends on the season or time of day; the normal range is medically defined among 10-21mmHg.

What is Aqueous humor?

Aqueous humoris is a liquid that fills between anterior chamber (the cornea and the iris) and the posterior chamber (the iris and the lens) to provide nutrition to lens and cornea. It also keeps a pressure in the eye.
The water was produced by the ciliary body, normally drains into the front of the eye (anterior chamber) through tissue (trabecular meshwork) at the angle where the iris and cornea meet. However, when the water doesn’t flow properly, intraocular pressure will increase. How it stunts the water flowing in the eyes, this disease are categorized several types.

  • Open-angle glaucoma
    Open-angle glaucoma is the most common form of the disease. The drainage angle formed by the cornea and iris remains open, but the trabecular meshwork is partially blocked.
  • Angle-closure glaucoma
    Angle-closure glaucoma occurs when the iris bulges forward to narrow or block the drainage angle formed by the cornea and iris. As a result, fluid can't circulate through the eye and pressure increases.
    Angle-closure glaucoma may occur suddenly (acute angle-closure glaucoma) or gradually (chronic angle-closure glaucoma). Acute angle glaucoma is a medical emergency. It can be triggered by sudden dilation of your pupils.
  • Normal-tension glaucoma
    In normal-tension glaucoma, your optic nerve has damaged even though your intraocular pressure is within the normal range. Especially 60% of Japanese patients are corresponding to this case. You may have a sensitive optic nerve, or you may have less blood being supplied to your optic nerve.
  • Ocular hypertension
    Ocular hypertension is a condition in which intraocular pressure is higher than normal range. In this condition, your optic nerve has neither damages nor visual field defect yet. However, it involves higher risk of glaucoma, it is important to take a periodic medical check-up.

Online reservation

Reservation by phone is also possible.

Office hours




11:30-18:30(no lunchtime.)


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


Higashiikebukuro, Toshima-ku, Tokyo, 170-0013

TEL: +81-3-3981-6363


・1-minute walk from Ikebukuro station east exit.

・Our clinic is on the right side of "LABI (Yamada Denki)".
The clinic is on the fifth floor of the building which "Bank of Mitsubishi UFJ" is on the first floor.


・Access to our clinic from JR Ikebukuro station east exit
・Access to our clinic by car
・Airport to Ikebukuro




Doctor career

Director:Yoshiko Hori

(A board-certified ophthalmologist Ph.D)
English fluent


Japanese Ophthalmological Society
Japan Ophtalmologists Association
Japan Cornea Society
Japanese Society of Ophthalmic Surgeons
Japanese Society of Cataract and Refractive Surgery


1986: Graduate-School of Medicine of Iwate Medical University
1990: Post Graduate school of Iwate MedicalUniversity
1991: Iwate prefectural Ofunato hospital
1993: Department of Ophthalmology Iwate Medical University Instructor
1993: Schepens Eye Research Institute of Harvard University
1997: Department of Ophthalmology Tokyo Dental College
1997: Minami-Aoyama Eye Clinic
2008: Ichikawa general hospital Department of Ophthalmology Tokyo Dental College
2010: IkebukuroSunshineStreetEyeClinic(Director since 2010)

Main Research

The three-dimensional organization of collagen fibrils in the human cornea and sclera.(maiden name Komai)


It is said that we are gaining 80 percent of the outside information through our eyes. Because we live in the information-intensive society nowadays, we tend to overuse our eyes at any times, and tend to suffer from various kinds of eye troubles.
Therefore, ophthalmological checkup and care has become significant.
If you have any concern about your eye condition, please feel free to consult us.
We will provide careful treatment and will try our best so that you can receive our consultation with full satisfaction.


Doctor:Yasuhiro Shinkawa

(A board-certified ophthalmologist)


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


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: Ikebukuro Sunshine Street 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, 3 part-time orthoptists, 1 full-time nurse and 1 part-time nurses in our clinic.