Which statement about hyperopia is true according to the testing criteria?

The statement that a child passes if they identify four or more symbols correctly is true according to the testing criteria for hyperopia. This criterion is designed to establish a benchmark for visual acuity testing, ensuring that children can clearly and accurately identify symbols that are representative of visual stimuli.

Identifying at least four symbols indicates a sufficient level of visual acuity, which helps in recognizing whether the child may have hyperopia, a condition commonly known as farsightedness. In a testing context, the ability to correctly identify multiple symbols demonstrates functional vision, which is critical for effective visual performance in daily activities such as reading or recognizing objects at varied distances.

The other statements do not align with standard testing practices. For instance, a child cannot be deemed to have failed for identifying less than four symbols alone, as other factors may influence visual performance. Similarly, hyperopia does have effects on visual acuity, contradicting the assertion that it has no impact. Additionally, a requirement to identify all symbols correctly sets an unreasonably high standard that does not reflect typical expectations in vision testing. Therefore, the criteria emphasize a balance between accuracy and practicality, allowing for a fair assessment of visual capabilities.