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Featured researches published by Isao Matsumura.


Archive | 1983

The Design of an Open View Autorefractometer

Isao Matsumura; Shigeo Maruyama; Yasuyuki Ishikawa; Reiji Hirano; Kazunobu Kobayashi; Yoshimi Kohayakawa

Remarkable progress has been made in the design of automatic refractometers, particularly because of advances in electronics and microcomputers. Various types of automatic refractometers incorporating the advanced technologies have been introduced and they have increased the demand for an instrument that enables us to measure refraction with high reliability.


Archive | 1982

Eye fundus camera

Haruhisa Madate; Isao Matsumura; Kyoji Sekiguchi


Archive | 1978

Eye examining instrument

Isao Matsumura


Archive | 1980

Apparatus for measuring the refractive power of the eye

Isao Matsumura; Yasuyuki Ishikawa; Shigeo Maruyama; Reiji Hirano; Yoshimi Kohayakawa


Archive | 1981

Eye testing instrument

Isao Matsumura


Archive | 1979

Automatic eye-refractometer

Isao Matsumura; Yasuyuki Ishikawa; Shigeo Maruyama; Reiji Hirano; Yoshimi Kohayakawa


Archive | 1974

Eye fundus camera with focus setting device

Yoshimi Kohayakawa; Isao Matsumura


Archive | 1981

Variable magnification apparatus having illumination compensating ability

Isao Matsumura


Archive | 2001

Medical instrument control system

Isao Matsumura; Yoshito Yoneyama


Archive | 1989

Ophthalmologic apparatus and method of compounding the image of an eye to be examined

Yoshimi Kohayakawa; Kenichi Kashiwagi; Isao Matsumura

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