A Centrometer
The interpupillary distance meter is a measuring instrument used to measure the distance between the pupils of the human eye in the process of refraction and fitting.
The measuring principle of the interpupillary distance meter is: the optotype illuminated by the light source is imaged at a certain working distance in front of the patient's eyes through the optical system. When the patient looks at the optotype, the visual axis of the left and right eyes intersect at this specific working distance. Distance. At this time, the light forms a reflective point on the surface of the patient's left and right corneas. The optometrist can see the reading balance spring and these two reflection points at the same time through the eyepiece. After moving the left and right reading balance springs to the reflection points of the patient's left and right eyes, the pupil distance of the patient can be obtained on the display screen.
The interpupillary distance meter verification device is composed of an adjustable worktable with a two-dimensional movement direction, and three standard sleeves with nominal interpupillary distances of 55mm, 65mm, 75mm, and the actual center distances of the three standard sleeves The deviation between the value and the theoretical center distance value should be controlled within 0.1mm.
The interpupillary distance meter verification device has two standard simulated eyes with OD to simulate the reflection point of the target image observed from the pupil of the patient in the working state.
Thanks for time reading.
Sophie Yang
004@mikeeyewear.com
