interpupillary distance


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interpupillary distance

In ophthalmology, the distance between the centers of the pupils of the eyes.
See also: distance
References in periodicals archive ?
Key words: Interpupillary distance, anterior teeth selection
The left and right viewing channels could be mechanically adjusted between 55 and 71 mm separations for different participants' interpupillary distances.
1), with an interorbital distance of 41 mm (normal: 18-35 mm), (3) an interpupillary distance of 86 mm, intention tremor, brady-diadochokinesia, reduced tendon reflexes, discrete weakness for foot extension and markedly reduced nerve conduction velocities, (Table 1).
In "true" collimation the two barrels remain aligned with each other for all interpupillary distance settings.
That's because it not only eliminates one complete barrel assembly -- one-half a binocular -- but also the entire hinge assembly required for setting interpupillary distance, along with the entire central focusing mechanism.
Key features for both models include roof-prism design, interpupillary distance lock, textured brown armor coating, retractable twist-up three-position eyecups, neoprene neck strap, carry case and custom eyepiece and objective lens covers.
A novel hinge-lock allows you to preset your interpupillary distance so that it can be quickly returned to a comfortable position after sharing the views with other observers.
The service has noted that the two 'particular areas of difficulty' that optical professionals should take note of today are the rise in complaints from those who have their sight test at one practice, then take their prescription to a different practice or source to have it dispensed--the second is when a practitioner refuses to measure interpupillary distance (PD), a controversy which was featured on BBC Radio 4's consumer rights programme, You and Yours this summer (OT, September 3).