Final answer:
Address unsatisfactory distance vision with Air Optix Aqua Multifocal lenses, the distance power should be modified (option C). Correcting vision involves changing the power of the lenses to accommodate for nearsightedness or farsightedness, and an optometrist calculates the necessary lens power adjustment.
Step-by-step explanation:
If you experience unsatisfactory distance vision while wearing Air Optix Aqua Multifocal contact lenses, the correct action to take is to modify the distance power of the lenses. Ignoring the issue would not resolve the visual discrepancy, adjusting the near vision settings would not affect distance vision, and closing one eye may not effectively correct the vision problem and is not a practical long-term solution.
The power of the eye changes with accommodation, which is the process of adjusting the eye's focal length to see objects at different distances. In the case of myopia or nearsightedness, corrective lenses with a diverging lens are used to decrease eye power and improve the ability to see distant objects. For hyperopia or farsightedness, converging lenses are used to increase eye power.
To determine the correct power for spectacle lenses, an optometrist calculates the necessary adjustment based on the specific vision needs of the patient, taking into account the distance of the corrective lenses from the eye and the patient's far or near point of clear vision.