The head position can be improved by changing the direction of gaze with the use of a trigon. This method is useful as a preoperative assessment, but is somewhat inadequate for therapeutic purposes, as most cephalometric rotations exceed 30 degrees C, which requires a trigonometric lens of nearly 60 degrees. Trigonometric lenses with glass or resin lenses are too thick, too heavy and can cause aberrations in the image. Because resin prisms can only be used for about 7 degrees per eye. Fortunately, the introduction of 3M’s new pressed trigonometry lenses has changed this deficiency, as the pressed resin lenses reduce the weight and thickness of the central and marginal lenses, allowing us to fit patients with up to 20 – 30 degrees of pressed trigonometry lenses per eye (while also combining other myopia, hyperopia, and astigmatism). With the advancement of technology, the use of 3M’s compression triclinic lenses in clinical practice has brought joy to more patients with nystagmus.