What is the most common method for recording visual acuity in infants and preverbal children?

The most common method for recording visual acuity in infants and preverbal children involves the use of a method known as CSM, which stands for Contrast Sensitivity Measurement. This technique allows for the assessment of how well a child can see at different contrasts, which is particularly important for this age group as they may not be able to respond to traditional visual acuity tests that rely on letter recognition or specific verbal responses.

In clinical practice, CSM is effective because it utilizes visual stimuli such as patterns or shapes that can be easier for young children to detect. It caters to the developmental stage of infants and preverbal children by providing a visual platform they can understand, allowing for an accurate measure of their visual capability.

The other methods listed, while possibly relevant in other contexts, do not specifically address the unique needs of assessing vision in very young children who cannot communicate clearly or follow complex instructions required by other techniques. Using CSM enables clinicians to gather meaningful data while minimizing stress or confusion for the child. This method is well-established in pediatric ophthalmology and is preferred for its effectiveness in this specific population.