What type of test is used to measure visual acuity in children?

The Lea symbols test is specifically designed for assessing visual acuity in children, particularly those who may not yet be able to read. This test utilizes child-friendly symbols rather than letters or numbers, making it easier for young patients to understand and engage with the assessment. The symbols used are easily recognizable to children, which allows for an accurate measurement of their vision.

In contrast, a standard eye chart primarily features letters, which may not be useful for younger patients who have not yet learned their alphabet. The Ishihara test is commonly employed for color vision testing and is not intended to measure visual acuity. The swinging flashlight test is a method used for assessing the pupillary response and is not designed for determining visual acuity in any population, including children. Therefore, the Lea symbols test is the most appropriate method for this specific demographic.