Final answer:
For non-English speakers and children, LEA Symbols or Allen figures visual acuity charts are used to measure visual acuity with simple, recognizable symbols instead of letters, allowing for accurate assessments independent of language ability.
Step-by-step explanation:
For children or people who do not speak English, the LEA Symbols or the Allen figures visual acuity charts are often used instead of the traditional Snellen chart. These charts have simple and easily recognizable symbols such as apples, houses, and circles that are not dependent on language abilities. As in the Snellen chart, the symbols on these charts vary in size to measure visual acuity.
The smallest symbol that can be correctly identified from a standard distance indicates the level of the person's visual acuity. These charts are useful for testing patients with limited language skills or developmental levels, allowing for an accurate assessment of visual acuity without the need for reading or language comprehension.