The Tele Vue Dioptrx Astigmatism Correcting Lens - 2.25 Diopter is a special corrector lens, which can be attached and locked onto the tops of over 20 long eye-relief Tele Vue eyepieces to achieve the sharpest full-field viewing possible. The Dioptrx series of lenses are used specifically to compensate for your eye's astigmatism.
Tele Vue Dioptrx models are available in 0.25 diopter steps, from 0.25 up to 3.5 diopters, and are rotatable for tuning to the best orientation. A series of engraved letters on the barrel helps to monitor their orientation. Simply choose the Dioptrx model that matches your eyeglass prescription for astigmatism.
To overcome the common vision limitation called astigmatism, which the majority of people have, Tele Vue has developed a corrector which fits directly onto the eyepiece. Previously, the only way to correct for this was by wearing eyeglasses. That is, until now! Tele Vue Dioptrx Astigmatism Correcting Lenses extract the maximum visual performance you can get from your telescope and eyepieces. All the Dioptrx lenses are multi-coated glass in anodized aluminum housings, with rubber eyeguards for comfort.