Question

How to Measure Near PD with a PD Rule?

Answer 1

To measure Near PD with a PD Rule, follow these steps: Hold a PD Rule in front of your eyes and align the zero mark with the center of your nose. Focus on a distant object and close your non-dominant eye. Then, note the measurement on the PD Rule where the distant object aligns with one of its marks. Repeat the previous step with your dominant eye. Calculate the Near PD by subtracting the two measurements you obtained from the PD Rule. This will give you the distance between the centers of your eyes when focusing at near vision.

Step-by-step explanation:

To measure Near PD with a PD Rule, follow these steps:

1. Hold a PD Rule in front of your eyes and align the zero mark with the center of your nose.
2. Focus on a distant object and close your non-dominant eye. Then, note the measurement on the PD Rule where the distant object aligns with one of its marks.
3. Repeat the previous step with your dominant eye.
4. Calculate the Near PD by subtracting the two measurements you obtained from the PD Rule. This will give you the distance between the centers of your eyes when focusing at near vision.