How much image jump will be created by a +2.00 D flat top 25mm segment add with a carrier lens of +2.25 DS?

To determine the amount of image jump created by a +2.00 D flat top 25mm segment add with a carrier lens of +2.25 DS, you need to understand how to calculate the image jump that results from the difference in optical power of the segment add and the carrier lens.

Image jump occurs when the gaze shifts from the distance portion of a lens to the near portion (the add segment). The formula utilized to calculate the image jump in prism diopters is given by:

Image Jump (in prism diopters) = (Add power - Carrier power) × Segmented height in cm.

In this scenario:

• The add power of the flat top segment is +2.00 D.

• The carrier power is +2.25 D.

• The height of the segment (where the add starts) is 25mm, which is equivalent to 2.5 cm.

First, find the difference in power:

Add power - Carrier power = 2.00 D - 2.25 D = -0.25 D.

Now, apply the formula for image jump:

Image Jump = (-0.25 D) × 2.5 cm = -0.625 prism diopters.

However, to convert