Perimeter

Claim 2

A perimeter, comprising in the following order in an optical path: a semi-transparent member adapted to be disposed in a fixed position in front of an eye to be examined which transmits index light to the eye; an index imaging system behind said semi-transparent member in the optical path, said index imaging system having a predetermined index adapted to be projected onto a fundus of the eye to be examined by said index imaging system; and a light-shielding cover for shielding external light, wherein said index imaging system is in one body rotatable about the iris of the eye to be examined within a range of said semi-transparent member to displace a position of an index image on the fundus of the eye through said semi-transparent member, and said index imaging system comprises image forming means for moving an intermediate image of said index in the direction of the optical axis toward a position corresponding to a refractive power of the eye.

Claim 3

A perimeter according to claim 1, wherein said semi-transparent member has a semi-spherical surface with said eye being located at a center thereof.

Claim 4

A perimeter according to claim 1, wherein said semi-transparent member is a planar screen.

Claim 5

A perimeter according to claim 1, further comprising a fixed-index projection system.

Claim 6

A perimeter according to claim 4, wherein an index by said fixed-index projection system is arranged to be located at the same optical distance with respect to the examined eye as an index of said index projection system, and the spatial distances thereby from said eye are synchronously moved.

Claim 7

A perimeter according to claim 1, further comprising a background illumination system.

Claim 8

A perimeter according to claim 4, further comprising a background illumination system.

Claim 9

A perimeter according to claim 1, wherein index projection can be switched between a left eye and a right eye to be examined.

Claim 10

A perimeter according to claim 8, wherein said index projection system is movable in a direction perpendicular to the optical axis so as to switch between the left and right eyes.

Claim 11

A perimeter according to claim 1, wherein said semi-transparent member has an elliptical dome, whose first focal point is located at the iris of said eye, is arranged in front of said eye, and a background illumination source is arranged at a second focal point of said elliptical dome so as to project said index through said elliptical dome.

Claim 12

A perimeter according to claim 10, wherein a fixed-index projection system and said index projection system are arranged behind said elliptical dome.

Claim 13

A perimeter, comprising: a semi-transparent member adapted to be disposed in a fixed position in front of an eye to be examined which transmits index light to the eye; a mirror reflecting member adapted to be disposed behind said semi-transparent member in an optical path which reflects index light specularly to the eye; an index imaging system, said index imaging system having a predetermined index adapted to be projected onto a fundus of an eye to be examined by said index imaging system; and a light-shielding cover for shielding external light, wherein said index imaging system is in one body rotatable about the iris of the eye to be examined within a range of said semi-transparent member to displace a position of an index image on the fundus of the eye and wherein at least a part of said index imaging system is movable relative to the eye to be examined in the direction of the optical axis toward a position corresponding to a refractive power of the eye.

Claim 14

A perimeter, comprising: a semi-transparent member adapted to be disposed in a fixed position in front of an eye to be examined which transmits index light to the eye; a mirror reflecting member adapted to be disposed behind said semi-transparent member in an optical path which reflects index light specularly to the eye; an index imaging system, said index imaging system having a predetermined index adapted to be projected onto a fundus of an eye to be examined by said index imaging system; and a light-shielding cover for shielding external light, wherein said index imaging system is in one body rotatable about the iris of the eye to be examined within a range of said semi-transparent member to displace a position of an index image on the fundus of the eye and wherein at least a part of said index imaging system is movable relative to the eye to be examined in the direction of the optical axis toward a position corresponding to a refractive power of the eye.

Claim 15

A perimeter according to claim 12, wherein said mirror reflection member is movable in three dimensions, and said index projection system is synchronized with movement of said mirror reflection member so that said index projection system projects the light beam from said index toward said eye.

Claim 16

A perimeter according to claim 12, wherein a plurality of said mirror reflection members are fixed in position, and said index projection system comprises means for directing a light beam toward each of said mirror reflection members.

Claim 17

A perimeter according to claim 12, wherein another mirror reflection member is arranged in a semi-spherical shape having said eye substantially at a center thereof.

Claim 18

A perimeter according to claim 12, wherein said mirror reflection member has an elliptical surface whose first focal point is located at an iris of said eye.

Claim 19

A perimeter according to claim 16, wherein a light-diffusing light source for background illumination is arranged behind said elliptical surface.

Claim 20

A perimeter according to claim 16, wherein said index is arranged at a second focal point.

Claim 21

A perimeter according to claim 16, wherein a background illumination source is arranged in front of said elliptical surface.

Claim 22

A perimeter according to claim 12, wherein said index projection system can be switched between a left eye and a right eye to be examined.

Claim 23

A perimeter according to claim 20, wherein light-shielding means which can select a light-shielding state and a light-transmitting state is arranged in front of the left and right eyes.

Claim 24

A perimeter according to claim 20, wherein a left-right eye switching operation is performed through an elliptical dome which has a first focal point at a predetermined position, and is rotatable about said predetermined position.

Claim 25

A perimeter comprising: a predetermined index to be projected onto a fundus of an eye to be examined; an index projection system which can form an intermediate image of said index in front of said eye, wherein said index projection system can be switched between a left eye and a right eye to be examined; and a mirror reflection member disposed in front of the eye to be examined in an optical path of said index projection system so as to keep a uniform field view, which specularly reflects index lights to the examined eye; wherein an optical system as being at least a part of said index projection system, is movable to displace a position of the index image on the fundus of said eye, and said index projection system comprises image forming means which moves said intermediate image in the direction of the optical axis and light-shielding means which can select a light-shielding state and a light-transmitting state is arranged in front of the left and right eyes and wherein said light-shielding means is a liquid crystal shutter.

Claim 26

A perimeter comprising: a predetermined index to be projected onto a fundus of an eye to be examined; an index projection system which can form an intermediate image of said index in front of said eye, wherein said index projection system can be switched between a left eye and a right eye to be examined; and a mirror reflection member disposed in front of the eye to be examined in an optical path of said index projection system so as to keep a uniform field view, which specularly reflects index lights to the examined eye; wherein an optical system as being at least a part of said index projection system, is movable to displace a position of the index image on the fundus of said eye, and said index projection system comprises image forming means which moves said intermediate image in the direction of the optical axis and light-shielding means which can select a light-shielding state and a light-transmitting state is arranged in front of the left and right eyes and wherein said light-shielding means is a liquid crystal shutter.

Claim 27

A perimeter comprising: a predetermined index to be projected onto a fundus of an eye to be examined; an index projection system which can form an intermediate image of said index in front of said eye; and a mirror reflection member disposed in front of the eye to be examined in an optical path of said index projection system so as to keep a uniform field view, which specularly reflects index lights to the examined eye, wherein said mirror reflection member has an elliptical surface whose first focal point is located at an iris of said eye and wherein a second elliptical surface whose first focal point is located at the iris of said eye is arranged at the side of said elliptical surface opposing said eye; wherein an optical system as being at least a part of said index projection system, is movable to displace a position of the index image on the fundus of said eye, and said index projection system comprises image forming means which moves said intermediate image in the direction of the optical axis.

Claim 28

A perimeter comprising: a predetermined index to be projected onto a fundus of an eye to be examined; an index projection system which can form an intermediate image of said index in front of said eye; and a mirror reflection member disposed in front of the eye to be examined in an optical path of said index projection system so as to keep a uniform field view, which specularly reflects index lights to the examined eye, wherein said mirror reflection member has an elliptical surface whose first focal point is located at an iris of said eye and wherein a second elliptical surface whose first focal point is located at the iris of said eye is arranged at the side of said elliptical surface opposing said eye; wherein an optical system as being at least a part of said index projection system, is movable to displace a position of the index image on the fundus of said eye, and said index projection system comprises image forming means which moves said intermediate image in the direction of the optical axis.

Claim 29

A perimeter wherein a predetermined index to be projected onto a fundus of an eye to be examined; an index projection system which can form an intermediate image of said index in front of said eye; and a mirror reflection member disposed in front of the eye to be examined in an optical path of said index projection system so as to keep a uniform field view, which specularly reflects index lights to the examined eye; wherein said mirror reflection member has an elliptical surface whose first focal point is located at an iris of said eye wherein a second elliptical surface whose first focal point is located at the iris of said eye is arranged at the side of said elliptical surface opposing said eye; wherein an optical system as being at least a part of said index projection system, is movable to displace a position of the index image on the fundus of said eye, and said index projection system comprises image forming means which moves said intermediate image in the direction of the optical axis, wherein a second elliptical surface whose first focal point is located at the iris of said eye is arranged at the side of said elliptical surface opposing said eye, wherein light beams from said index projection system and said fixed-index projection system pass through a second focal point of said second elliptical surface.

Claim 30

A perimeter wherein a predetermined index to be projected onto a fundus of an eye to be examined; an index projection system which can form an intermediate image of said index in front of said eye; and a mirror reflection member disposed in front of the eye to be examined in an optical path of said index projection system so as to keep a uniform field view, which specularly reflects index lights to the examined eye; wherein said mirror reflection member has an elliptical surface whose first focal point is located at an iris of said eye wherein a second elliptical surface whose first focal point is located at the iris of said eye is arranged at the side of said elliptical surface opposing said eye; wherein an optical system as being at least a part of said index projection system, is movable to displace a position of the index image on the fundus of said eye, and said index projection system comprises image forming means which moves said intermediate image in the direction of the optical axis, wherein a second elliptical surface whose first focal point is located at the iris of said eye is arranged at the side of said elliptical surface opposing said eye, wherein light beams from said index projection system and said fixed-index projection system pass through a second focal point of said second elliptical surface.

Claim 31

A perimeter comprising in the following order in an optical path: a semi-transparent member adapted' to be disposed in a fixed position in front of an eye to be examined which transmits index light to the eye; a mirror reflecting member adapted to be disposed behind said semi-transparent member in the optical path which reflects index light specularly to the eye; and an index imaging system, said index imaging system having a predetermined index adapted to be projected onto a fundus of an eye to be examined by said index imaging system, wherein said index imaging system is in one body rotatable about the iris of the eye to be examined within a range of said semi-transparent member to displace a position of an index image on the fundus of the eye through said semi-transparent member and at least a part of said index imaging system is movable relative to the eye to be examined in the direction of the optical axis toward a position corresponding to a refractive power of the eye.

Claim 32

A perimeter comprising in the following order in an optical path: a semi-transparent member adapted' to be disposed in a fixed position in front of an eye to be examined which transmits index light to the eye; a mirror reflecting member adapted to be disposed behind said semi-transparent member in the optical path which reflects index light specularly to the eye; and an index imaging system, said index imaging system having a predetermined index adapted to be projected onto a fundus of an eye to be examined by said index imaging system, wherein said index imaging system is in one body rotatable about the iris of the eye to be examined within a range of said semi-transparent member to displace a position of an index image on the fundus of the eye through said semi-transparent member and at least a part of said index imaging system is movable relative to the eye to be examined in the direction of the optical axis toward a position corresponding to a refractive power of the eye.

Claim 33

A perimeter comprising, in the following order in an optical path: a semi-transparent member adapted to be disposed in a fixed position in front of an eye to be examined which transmits index light to the eye; and an index imaging system behind said semi-transparent member in the optical path, said index imaging system having a predetermined index adapted to be projected onto a fundus of the eye to be examined by said index imaging system, wherein said index imaging system is in one body rotatable about the iris of the eye to be examined within a range of said semi-transparent member to displace a position of an index image on the fundus of the eye through said semi-transparent member and at least a part of said index imaging system is movable relative to the eye to be examined in the direction of the optical axis toward a position corresponding to a refractive power of the eye.

Claim 34

A perimeter comprising, in the following order in an optical path: a semi-transparent member adapted to be disposed in a fixed position in front of an eye to be examined which transmits index light to the eye; and an index imaging system behind said semi-transparent member in the optical path, said index imaging system having a predetermined index adapted to be projected onto a fundus of the eye to be examined by said index imaging system, wherein said index imaging system is in one body rotatable about the iris of the eye to be examined within a range of said semi-transparent member to displace a position of an index image on the fundus of the eye through said semi-transparent member and at least a part of said index imaging system is movable relative to the eye to be examined in the direction of the optical axis toward a position corresponding to a refractive power of the eye.

Claim 35

A perimeter comprising in the following order in an optical path: a semi-transparent member adapted to be disposed in a fixed position in front of an eye to be examined which transmits index light to the eye; an index imaging system behind said semi-transparent member in the optical path, said index imaging system having a predetermined index adapted to be projected onto a fundus of the eye to be examined by said index imaging system; and a light-shielding cover for shielding external light, wherein said index imaging system is in one body three-dimensionally rotatable about the iris of the eye to be examined within a range of said semi-transparent member to displace a position of an index image on the fundus of the eye through said semi-transparent member and at least a part of said index imaging system is movable relative to the eye to be examined in the direction of the optical axis toward a position corresponding to a refractive power of the eye.

Claim 36

A perimeter comprising in the following order in an optical path: a semi-transparent member adapted to be disposed in a fixed position in front of an eye to be examined which transmits index light to the eye; an index imaging system behind said semi-transparent member in the optical path, said index imaging system having a predetermined index adapted to be projected onto a fundus of the eye to be examined by said index imaging system; and a light-shielding cover for shielding external light, wherein said index imaging system is in one body three-dimensionally rotatable about the iris of the eye to be examined within a range of said semi-transparent member to displace a position of an index image on the fundus of the eye through said semi-transparent member and at least a part of said index imaging system is movable relative to the eye to be examined in the direction of the optical axis toward a position corresponding to a refractive power of the eye.

Claim 37

A perimeter, comprising: an index mark projection system for projecting a target image to an eye to be examined along an optical axis of said index mark projection system, said index mark projection system generating a spatial image of an index mark between said index mark projection system and the eye to be examined, said index mark projection system having an adjusting member for generating the spatial image at a position corresponding to a refractive power of the eye; a semi-transparent member optically disposed in a fixed position between said index mark projection system and the eye, said index mark being projected on the eye through said semi-transparent member; and means for three-dimensionally rotating said index mark projection system around an iris of the eye as a rotation center within a range of said semi-transparent member so as to project the image of said index mark from an arbitrary direction through said semi-transparent member to the eye along the optical axis of said index mark projection system.

Claim 38

A perimeter, comprising: an index mark projection system for projecting a target image to an eye to be examined along an optical axis of said index mark projection system, said index mark projection system generating a spatial image of an index mark between said index mark projection system and the eye to be examined, said index mark projection system having an adjusting member for generating the spatial image at a position corresponding to a refractive power of the eye; a semi-transparent member optically disposed in a fixed position between said index mark projection system and the eye, said index mark being projected on the eye through said semi-transparent member; and means for three-dimensionally rotating said index mark projection system around an iris of the eye as a rotation center within a range of said semi-transparent member so as to project the image of said index mark from an arbitrary direction through said semi-transparent member to the eye along the optical axis of said index mark projection system.

Claim 39

A perimeter comprising: an index mark projection system for projecting a target image to an eye to be examined, said index mark projection system generating a spatial image of an index mark between said index mark projection system and the eye to be examined, said index mark projection system having an adjusting member for generating the spatial image at a position corresponding to a refractive power of the eye; a semi-transparent member optically disposed between said index mark projection system and the eye to be examined, said index mark being projected on the eye through said semi-transparent member; mirror member disposed behind said semi-transparent member, said mirror means receiving the projection light from said index mark projection system through said semi-transparent member and reflecting said projection light through said semi-transparent member to the eye; and means for three-dimensionally and interlockingly rotating said index mark projection system and said mirror means around an iris of the eye as a rotation center so as to project the image of said index mark from an arbitrary direction to the eye.

Claim 40

A perimeter comprising: an index mark projection system for projecting a target image to an eye to be examined, said index mark projection system generating a spatial image of an index mark between said index mark projection system and the eye to be examined, said index mark projection system having an adjusting member for generating the spatial image at a position corresponding to a refractive power of the eye; a semi-transparent member optically disposed between said index mark projection system and the eye to be examined, said index mark being projected on the eye through said semi-transparent member; mirror member disposed behind said semi-transparent member, said mirror means receiving the projection light from said index mark projection system through said semi-transparent member and reflecting said projection light through said semi-transparent member to the eye; and means for three-dimensionally and interlockingly rotating said index mark projection system and said mirror means around an iris of the eye as a rotation center so as to project the image of said index mark from an arbitrary direction to the eye.

Claim 41

A perimeter comprising: an index mark projection system for projecting a target image to an eye to be examined along an optical axis of said index mark projection system, said index mark projection system generating a spatial image of an index mark between said index mark projection system and the eye to be examined, said index mark projection system having an adjusting member for generating the spatial image at a position corresponding to a refractive power of the eye; a semi-transparent member adapted to be disposed in a fixed position in front of an eye to be examined which transmits index light to the eye; a mirror reflecting member optically disposed between said index mark projection system and said semi-transparent member, said index mark image being reflected and projected to the eye by said mirror reflecting member; and means for three-dimensionally rotating the light flux of said index mark projection system around a point optically conjugate with an iris of the eye as a rotation center within a range of said index mark from an arbitrary direction through said semi-transparent member to the eye along the optical axis of said index mark projection system.

Claim 42

A perimeter comprising: an index mark projection system for projecting a target image to an eye to be examined along an optical axis of said index mark projection system, said index mark projection system generating a spatial image of an index mark between said index mark projection system and the eye to be examined, said index mark projection system having an adjusting member for generating the spatial image at a position corresponding to a refractive power of the eye; a semi-transparent member adapted to be disposed in a fixed position in front of an eye to be examined which transmits index light to the eye; a mirror reflecting member optically disposed between said index mark projection system and said semi-transparent member, said index mark image being reflected and projected to the eye by said mirror reflecting member; and means for three-dimensionally rotating the light flux of said index mark projection system around a point optically conjugate with an iris of the eye as a rotation center within a range of said index mark from an arbitrary direction through said semi-transparent member to the eye along the optical axis of said index mark projection system.