The boundary between amblyopic eye and normal eye vision is not very clear, some babies complain of vision loss, but on objective examination, the visual acuity is still 1.0 or 1.2. This may be the result of the patient’s feeling of loss of vision in comparison with his/her previous vision. What are the main symptoms of amblyopia? Amblyopia is a common eye disease, when the child has amblyopia will cause great harm, and even lead to a variety of complications in the child’s eyes, so it is necessary to understand the symptoms of amblyopia in time for timely treatment, please see the following introduction. The five major symptoms of amblyopia in children 1, visual acuity and refractive error: amblyopia eye and normal eye vision boundaries are not very clear, some babies complain of vision loss, but the objective examination, visual acuity is still 1.0 or 1.2. This may be the patient with their own previous vision compared to the visual acuity and feel the loss of visual acuity. In addition, there may be some disorders in the optic cells of the central fossa or the conduction system thereafter, with a very small central dark spot, and there is a self-perceived visual impairment that cannot be detected objectively. If there are no organic changes in the amblyopic eye and its visual acuity is above 0.01 and below 0.2, it is mostly accompanied by fixed vision abnormalities. The relationship between amblyopia and refractive abnormality, hyperopic eyes accounted for more than the meridian weight, +2.00D mild hyperopia accounted for 37.7% of amblyopia, myopia appears to be more than mild amblyopia, so amblyopia has a close relationship with those who have a high degree of hyperopia. The severe amblyopia of strabismic amblyopia is more common in light strabismus than in exotropia, and the onset of internal strabismus is earlier than that of external strabismus. 2. Difficulty in divided reading: or crowding phenomenon. When checking visual acuity with the same reticle, illumination and distance, the values measured at different intervals of the reticle are different. Difficulty in reading is a characteristic of amblyopia. Difficulty in reading is the ability of the amblyopic eye to recognize individual retinas better than a collection or group of retinas. This means that the ability to recognize a single letter (e.g., an E) on a visual acuity chart is better than the ability to recognize a line of letters. The cause of the difficulty in reading apart has been variously suggested: it is believed that the long-term persistence of strabismus results in a restricted axial change in the cone cell population. The visualization of the visual standard appears to be distorted to one side and overlapped with the visual standard in its direction. Amblyopia only occurs in young children: Binocular amblyopia develops gradually from birth to 9 years of age. Strabismus can cause amblyopia during this developmental period, but after the age of 9, amblyopia does not occur even if there are any of the above reasons. Amblyopia only occurs in patients with monocular vision: amblyopia does not occur in patients who use both eyes alternately. Abnormal fixation: In patients with deep amblyopia, the retina next to the macula often replaces the macula for fixation due to the poor fixation ability of the macula. Eccentric fixation refers to fixation outside the center fossa, and there are many theories of its formation, but its manifestations include paracentral fixation, peripheral fixation, parafoveal fixation, and wandering fixation.