Review on visual acuity charts for preschool children

The preschool age is an important stage for the development of children’s vision.Visual problems can affect visual development of children, so it is necessary for preschool children to have vision examination.As an important method of preschool vision screening, visual acuity charts can be used for early screening of eye diseases in children.The benefits of screening before school entry have been demonstrated in practice.There are many kinds of visual acuity charts that can be used to test the vision acuity of preschool children aged 3 to 6 years.This review introduced the design of visual acuity charts and lists several types of charts for screening of preschool children.Simultaneously, we have analyzed a number of papers that compared preschool vision screening methods.The vision examination on children aged 3 to 6 years was necessary to discover various visual impairments.Choosing an appropriate visual acuity chart is the focus of low vision rehabilitation research.