Abstract: The present invention discloses a hand-held autonomous visual acuity measurement apparatus and a visual acuity measuring method. The invention comprises a corneal curvature measurement module comprising a first light source for emitting a first light beam and a first image collector for collecting an image formed from the first light beam after it has been reflected by cornea, the first image collector being movably provided in the corneal curvature measurement optical path of the corneal curvature measurement module, and the corneal curvature measurement module further comprises a first motor for driving the first image collector to move along the corneal curvature measurement optical path so that the first image collector moves to the imaging position.

Abstract: Disclosed is an optometry apparatus capable of measuring para-central defocus, comprising a diopter measurement module. The diopter measurement module comprises a first light source (1) emitting a first light beam. The optometry apparatus also comprises a scanning module for adjusting the position of a light spot formed on the retina by the first light beam. The scanning module comprises a first reflecting mirror (3) and a second reflecting mirror (5) rotatably positioned in sequence in the emergent optical path of the first light source (1). The rotation axis of the first reflecting mirror (3) and the rotation axis of the second reflecting mirror (5) form therebetween an angle greater than 0 degree and less than 180 degrees.

Abstract: The present invention discloses a hand-held autonomous visual acuity measurement apparatus and a visual acuity measuring method. The invention comprises a corneal curvature measurement module comprising a first light source for emitting a first light beam and a first image collector for collecting an image formed from the first light beam after it has been reflected by cornea, the first image collector being movably provided in the corneal curvature measurement optical path of the corneal curvature measurement module, and the corneal curvature measurement module further comprises a first motor for driving the first image collector to move along the corneal curvature measurement optical path so that the first image collector moves to the imaging position.

Abstract: Disclosed is an optometry apparatus capable of measuring para-central defocus, comprising a diopter measurement module. The diopter measurement module comprises a first light source (1) emitting a first light beam. The optometry apparatus also comprises a scanning module for adjusting the position of a light spot formed on the retina by the first light beam. The scanning module comprises a first reflecting mirror (3) and a second reflecting mirror (5) rotatably positioned in sequence in the emergent optical path of the first light source (1). The rotation axis of the first reflecting mirror (3) and the rotation axis of the second reflecting mirror (5) form therebetween an angle greater than 0 degree and less than 180 degrees.