As positive power increases, what adjustment should be made to the base curve of a lens?

As positive power increases in a lens, the appropriate adjustment to the base curve is to steepen it. This is because positive power lenses (convex lenses) are designed to converge light rays, helping to focus images for individuals with hyperopia (farsightedness). Steeper base curves create a greater degree of convergence, which is necessary for higher positive powers to ensure that the focal point of the lens aligns correctly with the eye's optical axis.

For instance, if a patient requires a stronger positive prescription, a steeper base curve compensates for the increased power needed to focus light properly onto the retina. This enhances visual clarity and can help in alleviating potential distortions or aberrations that may occur with insufficiently steep curves in higher prescription lenses.

The other adjustments, such as flattening the base curve or changing it to a different shape, would not effectively accommodate the increased convergence required for strong positive lenses. Additionally, suggesting that no adjustment is needed would not ensure the optimal optical performance of the lens for the patient's vision needs.