If the lenses are not centered correctly in the eyewear, what should be the likely adjustment?

When lenses are not centered correctly in eyewear, adjusting the lenses within the frame is the most appropriate course of action. Proper lens positioning is crucial for optimal visual performance, as it ensures that the optical center of the lens aligns with the wearer's line of sight. If the lenses are off-center, it can lead to issues such as visual discomfort, distortion, or even double vision.

Adjusting the lenses in the frame may involve repositioning them to ensure that they sit correctly in line with the wearer's pupils, thus providing the best possible visual acuity and comfort. This correction can often be accomplished by repositioning the lenses within their respective grooves or making slight modifications to the frame itself.

In contrast, altering the prescription would not address the issue of misalignment and may result in further complications. Increasing the temple length or widening the bridge would also be irrelevant to correcting the lens centering issue, as these adjustments pertain to the overall fit of the eyewear rather than the alignment of the lenses.