Adjustable adult trial frame for refraction testing.Set the pupillary distance (PD) from 48–80 mm total, or 24–40 mm per side. The frame also allows adjustments to the temple angle, temple length (4.125–5.5 in / 98–135 mm), nose bridge height (0–14 mm), and nose angle (0–30°).

The frame accommodates up to three 38 mm trial lenses in front of each eye and one behind. Each lens position rotates through 360°, with clearly printed scales for alignment. Left and right axial calibration markings are provided. A built-in vertex-distance scale shows the distance between the lens and the eye.

Trial lenses are not included.