What if I only know the degree, but don’t know the interpupillary distance? You can measure your interpupillary distance as follows.
Interpupillary distance measurement
The full name papillary distance refers to the distance between the center points of the pupils of the two eyes. The purpose of measuring the interpupillary distance during optometry is to make the optical center distance of the fitted lens match the interpupillary distance and to ensure that the eyes can pass through the optical center.
To measure the interpupillary distance, you can invite family or friends to help, and you need to prepare a ruler with an accuracy of millimeters
(1) The surveyor and the surveyed person are sitting face to face, facing each other about 30cm apart, and the surveyed person looks at a fixed object 5 meters or 5 meters away behind the surveyor.
(2) The measurer uses the right hand to hold the right end of the ruler, and the “zero” scale on the left of the ruler is aligned with the black center point (pupil) of the right eye of the subject, and observe the black center point (pupil) of the left eye of the subject. The scale on the corresponding ruler is accurate to millimeters, and this scale is the interpupillary distance of the subject.
(3) Repeat step 2 for a total of 3 times, and take the average value. Then the conventional distance interpupillary distance is measured. Generally, the interpupillary distance of adult men is between 60 mm and 73 mm, and that of adult women is 55 mm. Between ~68mm, the most common is 62mm.