How does the combination of a riflescope and eyeglasses affect shooting performance?Updated 3 days ago

Eyeglass wearers always have a slight disadvantage compared to those who do not wear glasses. The use of additional lenses (eyeglass lenses) can cause optical distortions, which the observer may perceive as a changed visual impression and potentially find distracting.
Every riflescope includes a diopter adjustment, which can compensate for a shooter’s visual impairment to a certain degree. However, eyeglass wearers (especially those with prescriptions for distance corrections) should still wear their glasses while shooting. This is particularly important for shooters with astigmatism, as this condition cannot be corrected using the diopter adjustment on the riflescope, since astigmatism varies too much between individuals.
Image distortions are especially common when shooting with progressive lenses (multifocal glasses). Due to the design of these lenses, the shooter only has a narrow viewing channel. If the shooter deviates from this channel while aiming, image distortions can occur. These may appear as star-shaped, frayed illuminated dots or curved reticle lines. In addition, the image may appear blurry overall.
The choice of eyeglass frame is also a critical factor. If the frame is too small, the shooter may end up looking directly at the edge of the frame while aiming. Depending on the type of visual impairment, this can lead to double images or blind spots. For this reason, the eyeglass lenses should be sufficiently large — especially in the upper area — to ensure an unobstructed view while shooting.