A lens prescription of -2.25 D is made on a +6.00 base curve. The curve ground into the ocular surface would be:

In the scenario provided, a lens prescription of -2.25 D indicates a need for concave (minus) lens power to correct for myopia. The base curve refers to the curvature of the front surface of the lens, which, in this case, is a +6.00 D curve.

To determine the effective power of the lens when the base curve is factored in, it is essential to understand how lens powers combine. When a positive base curve is combined with a negative prescription, the powers are additive. Therefore, the formula to find the effective power at the ocular surface is:

Effective Power = Prescription Power + Base Curve Power

Plugging in the values from the scenario:

Effective Power = -2.25 D (the prescription) + +6.00 D (the base curve)

Effective Power = -2.25 D + 6 D = +3.75 D

However, the question asks for the curvature that would be seen from the ocular surface when the lens is placed against the eye. The effective power of the lens that acts on the eye needs to account for how these surface curvatures manipulate the light entering the eye. When discussed in a different context or possibly under imaginings, one can