What should be done if the top of the frame front presses against the brow?

When the top of the frame front presses against the brow, lengthening the pad arms is the appropriate adjustment to alleviate this pressure. By extending the pad arms, the nose pads will be positioned further away from the brow area, allowing the frame to sit more comfortably without causing discomfort or obstruction in the upper field of vision.

This adjustment helps in achieving a better fit for the wearer and ensures that the lenses sit appropriately in front of the eyes, contributing to optimal visual acuity.

The other options, such as shortening the pad arms, decreasing pantoscopic tilt, or shortening the temple length, would not adequately address the issue of frame pressure against the brow. Each of those adjustments would potentially lead to other fit problems or discomfort. For instance, if the pad arms are shortened, the pads would press even more firmly against the brow, exacerbating the discomfort. Therefore, lengthening the pad arms is the most effective solution in this scenario.