Synoptophore is a kind of multifunctional examination and training equipment commonly used in ophthalmology and optometry. It can mainly check the three-level visual function of human eyes (simultaneous vision, plane fusion image and stereopsis), as well as objective eye position examination, subjective eye position examination, abnormal retinal correspondence examination and visual rehabilitation training.

The main component of the same camera is the lens barrel connected by two metal arms on its base. Each lens barrel includes three parts: eyepiece, mirror and picture clip. The base of the lens barrel arm is provided with a dial, which is provided with two lines of scales, with roundness on the inner side and prism on the outer side. The lens barrel is attached with the height of the picture and the scale of rotation, which can move up and down and rotate. The left and right barrels of the synoptic machine can move around three axes: inward rotation and abduction around the vertical axis; Make vertical movement up and down around the horizontal axis; Rotate around the sagittal axis.

A plane reflector is installed in the lens barrel of the same vision machine, which forms an included angle of 45 ° with the line of sight, so that the two lens barrels can bend 90 ° to the left and right respectively, so that the patient can feel that the object image comes from the front. One end of the barrel is equipped with an eyepiece, the other end is equipped with a picture piece, and a + 7.00d positive lens is placed in the middle. The picture piece is just on the focus of the positive lens. The image of the picture piece is emitted into parallel light through the + 7.00d positive lens, resulting in 90 ° bending through the plane reflector. Therefore, the picture piece seen through the eyepiece of the same camera is equivalent to coming from infinity. The principle of synoptophore inspection is to directly use two lens barrels to break the binocular fusion image to realize binocular split vision, without the help of auxiliary lenses such as polarizing, red and green, so as to break the binocular split vision more thoroughly. The subject looked at the left picture with his left eye and the right picture with his right eye.