Whether a child with a visual acuity of 4.9 is considered myopic or not depends on the examination such as dilated optometry. If the child can be corrected to 5.0 and above by wearing negative lenses, he/she may be myopic.
For children before the age of 6 or 7 who are in the critical period of vision development, if their vision cannot reach a normal state of 5.0 or above, it may be due to incomplete development of vision, or there may be a slight case of hyperopia or astigmatism, and therefore it cannot be used as a basis for determining whether or not nearsightedness exists.
In order to clarify the specific situation of children’s vision, it is necessary to go to specialized hospitals and optometric centers to improve the pupil dilation examination of atropine and tropicamide, etc., in order to exclude the influence of adjusting factors on the visual acuity examination, so as to obtain the accurate degree and visual acuity status.
It is recommended that children’s vision should be tested regularly at an appropriate age, so as to detect the insufficient reserve of farsightedness and early myopia in time, and to provide timely and effective corrective training and other treatments.