Certified Ophthalmic Assistant Practice Exam

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What is the most common way to record visual acuity in infants and preverbal children?

  1. Snellen chart

  2. LogMAR chart

  3. CSM

  4. Tumbling E chart

The correct answer is: CSM

The most common way to record visual acuity in infants and preverbal children is through CSM, which stands for Central, Steady, and Maintained. This method involves observing the child's response to various stimuli such as light, movement, or objects and noting the central, steady fixation and maintained attention. While Snellen, LogMAR, and Tumbling E charts are commonly used to test visual acuity in older children and adults, these methods are not suitable for infants and preverbal children who may not understand or cooperate with traditional visual acuity tests. Therefore, the CSM method is preferred in this population.

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