Certified Ophthalmic Medical Technologist (COMT) Practice Exam

What is the initial distance to start the target when performing the push up method for measuring NPA?

1. 0.5 meters

2. 1 meter

3. 1.5 meters

4. 2 meters

The correct answer is: 1 meter

In the context of measuring Near Point of Accommodation (NPA) using the push-up method, it is standard practice to start with an initial distance of 1 meter. This measurement is important because it provides a baseline that is relevant and manageable for most individuals when assessing their accommodation ability. The push-up method involves moving a target closer to the eyes until it can no longer be clearly seen. Starting at 1 meter allows for a sufficient length of distance to gradually push the target inward, making it easier to track changes in accommodation capability without overwhelming the subject. Using a distance that is too short could lead to inconsistencies in the measurement, as some individuals may find it challenging to focus efficiently. Conversely, beginning at a distance that is too long might not provide an adequate range of motion to capture a clear data point for the near point of accommodation. Therefore, the 1-meter starting position strikes an effective balance for this assessment method.