Strabismus amblyopia is a condition in which the visual center actively suppresses the macular visual impulses from the strabismic eye due to the discomfort caused by double vision and confusion caused by strabismus, which results in amblyopia called strabismus amblyopia due to the long term suppression of the macula in that eye. Strabismus suppression test: 1. Fundoscopy With the help of fundoscopy, the doctor can see the blood vessels in the retina behind the eyeball and the optic nerve (which transmits information between the eye and the brain). This is the only place in the body where blood vessels and nerves can be seen without cutting into them. Vitreous and fundus examinations are performed with the help of a fundoscope to detect eye diseases that affect vision. Patients with high blood pressure and diabetes must undergo this examination regularly. 2, retinal screening method retinal screening optometry known as retinal screening method (retinoscopy, skiascopy) is an objective method of optometry, screening is a kind of other methods to measure the refractive state of the eye. Long-term training is needed to grasp the true meaning. 3.Stereoscopic vision Stereoscopic vision is the sense that both eyes can distinguish the shape of objects near and far when observing a scene. 4.Maddox rod examination method Mainly used to check hidden strabismus. Maddox rod (referred to as Mars rod) consists of a number of small glass rods arranged parallel to each other, due to the columnar lens has a parallel to its axis of light through the non-flexure, perpendicular to the axis of the nature of the light refractive, because of which the light source through the Mars rod (point-like), become a perpendicular to the axis of the columnar lens and a strip of light. 5, vision screening instrument vision screening is the most important means of detecting early childhood amblyopia, this type of instrument has the advantages of objectivity, accuracy, rapidity and so on.