Abstract: if the child has strabismus, the visual acuity of both eyes can also be judged by covering. If the normal eye is covered, the deviated eye will immediately become normal. After removing the cover, the deviated eye will immediately return to the deviated position, indicating that the children’s strabismus vision is low., Under normal circumstances, infants are in hyperopia soon after birth. With the development of age, children’s vision does not reach the normal standard in preschool, which does not mean that it is abnormal. Children’s visual acuity develops rapidly, which may be easier to accelerate the occurrence and development of myopia. School age children should regularly review their visual acuity and refractive status every three months and no more than half a year., 1) mydriatic optometry: retinoscopy or hand-held computer optometry can be used for optometry. According to the optometry results, the visual acuity of children can be roughly judged, and the diopter of children can be measured in time, so as to correct them as soon as possible., (2) test visual acuity with light: for example, if the light of flashlight irradiates the children’s eyes, the pupil will shrink, indicating that there is a sense of light. Shine the light of the flashlight on the toy, and their eyes can follow the light now, indicating that they have the ability to watch., (3) monocular covering method: the covering method can judge whether the visual acuity of two eyes is equal. If there is a great difference in vision, amblyopia may exist in one eye. The specific method is: when the child is looking, he suddenly covers one eye. The covered eye is an eye with low vision, and children usually have no obvious response; The covered eye is the eye with better vision, and the child will strongly refuse or even cry., If the child has strabismus, the visual acuity of both eyes can also be judged by covering. If the normal eye is covered, the deviated eye immediately becomes normal, and the deviated eye immediately returns to the deviated position after removing the cover, indicating that the children’s strabismus vision is low; Cover the eyes in the normal position. After removing the cover, the deviated eyes can maintain the normal position. After several blinks, they can still maintain the normal position, indicating that the visual acuity of the children’s two eyes is basically the same. Generally speaking, the visual acuity of two eyes of children with alternating strabismus is basically equal. Children with monocular strabismus often have poor vision., (4) observation of nystagmus: if the child has severe nystagmus and is pendulum shaped, it indicates that the vision of both eyes of the child may be quite low., (5) special examination methods: there are other methods, such as visual evoked potential, selective viewing, optokinetic nystagmus, etc. these methods belong to objective examination methods, which can accurately measure the visual acuity of infants and young children. However, due to the complex operation, expensive instruments and time-consuming examination, these methods are usually used in visual research, and have not been widely used to measure visual acuity.,
under normal circumstances, infants are in hyperopia soon after birth. With the development of age, children’s vision does not reach the normal standard in preschool, which does not mean that it is abnormal. Children’s visual acuity develops rapidly, which may be easier to accelerate the occurrence and development of myopia. School age children regularly review their visual acuity and refractive status every three months and no more than half a year.
1) mydriatic optometry: retinoscopy or hand-held computer optometry can be used for optometry. According to the optometry results, the visual acuity of children can be roughly judged, and the degree of ametropia of children can be measured in time for early correction.
(2) test visual acuity with light: for example, if the light of a flashlight shines on the children’s eyes, the pupil will shrink, indicating that there is a sense of light. Shine the light of the flashlight on the toy, and their eyes can follow the light now, indicating that they have the ability to watch.
(3) monocular masking method: the masking method can judge whether the visual acuity of two eyes is equal. If there is a great difference in vision, amblyopia may exist in one eye. The specific method is: when the child is looking, he suddenly covers one eye. The covered eye is an eye with low vision, and children usually have no obvious response; The covered eye is the eye with better vision, and the child will strongly refuse or even cry.
if the child has strabismus, the visual acuity of both eyes can also be judged by covering. If the normal eye is covered, the deviated eye immediately becomes normal, and the deviated eye immediately returns to the deviated position after removing the cover, indicating that the children’s strabismus vision is low; Cover the eyes in the normal position. After removing the cover, the deviated eyes can maintain the normal position. After several blinks, they can still maintain the normal position, indicating that the visual acuity of the children’s two eyes is basically the same. Generally speaking, the visual acuity of two eyes of children with alternating strabismus is basically equal. Children with monocular strabismus often have poor vision.
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(4) observation of nystagmus: if the child has severe nystagmus and shows a pendulum type, it indicates that the vision of the child’s two eyes may be quite low.
(5) special examination methods: there are other methods, such as visual evoked potential, selective viewing, optokinetic nystagmus, etc. these methods belong to objective examination methods, which can accurately measure the visual acuity of infants and young children. However, due to the complex operation, expensive instruments and time-consuming examination, these methods are usually used in visual research and have not been widely used to measure visual acuity.