Close focus distance for 42 year old: Tip of 10 year old’s finger to elbow. Close focus distance for 10 year old: Edge of 42 year old’s forefinger to edge of pinky finger.
Close focus distance for 42 year old: Tip of 10 year old’s finger to elbow. Close focus distance for 10 year old: Edge of 42 year old’s forefinger to edge of pinky finger.