Final answer:
The initial power for Proclear 1 day multifocal lenses for a distance prescription of -2.00 diopters with a +1.75 ADD should start with the distance correction. The ADD power is included in the multifocal design and does not change the initial distance power selected.
Step-by-step explanation:
Choosing the initial power for Proclear 1 day multifocal contact lenses involves taking into account both the distance prescription and the added power for near vision. For a prescription of -2.00 diopters (D) for distance vision (OU, or both eyes) combined with an +1.75 ADD for near vision, you would typically start with the specified distance prescription. The ADD power is used to correct presbyopia by allowing for additional magnification for near tasks.
The initial power chosen would be the power that corrects the person's distance vision to normal, which in this case is -2.00 D. The +1.75 ADD is then factored in separately within the multifocal design of the lens to provide the extra magnification needed for near vision work. This is different from single vision lenses, where only one power is prescribed.
The choice of initial power must also take into account the patient's visual needs, lifestyle, and how they will be using their multifocal lenses. Therefore, evaluating both distance and near visual requirements is essential when selecting the appropriate lens power. An optometrist would be able to determine the best fit for the patient's particular needs.