Pupil Distance

Views Updated: Dec 15, 2025

Abbreviation

Pronunciation

/ˈpjupəl ˈdɪstəns/

Pupil Distance(PD) measurement is an essential step in the process of fitting glasses and an important prerequisite for choosing an appropriate glasses.
In order to move the display flexibly, the mechanical structure is dominated by the vertical adjusting mechanism, pupil distance adjusting mechanism, the rotating mechanism. Pupil distance adjustment mechanism can achieve the 37 mm course and 4 mm fine-tuning.
The Standard Uncertainty of Verification for Pupil Distance(PD) Meter
After obtaining the required image of iris, a series of approaches have been adopted to rectify the image in this paper, which eliminate the influence on iris image due to the contraction of pupil, the distance to video camera and the ill-distributed light.
In the end, it expounds the successive approach method to confirm the boundary of abaxial beams, and how to realize global optimization of the aperture stop ′ s position using the entrance pupil ′ s distance variable.

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