Final answer:
Proclear 1 day multifocal contact lenses feature a trifocal design, allowing clear vision at near, intermediate, and far distances for individuals with presbyopia. Myopic correction involves using a diverging lens to reduce power, while hyperopic correction uses a converging lens to increase power.
Step-by-step explanation:
The design of Proclear 1 day multifocal contact lenses is a multifocal design for simultaneous vision at different distances. Correctly, this is option A: Trifocal design for simultaneous vision at different distances. These lenses are designed to help individuals with presbyopia, a condition that affects the ability to focus on objects at various distances. This type of contact lens allows for clear vision whether the user is looking at something up close, at an intermediate distance, or far away.
In the context of vision correction and intraocular lenses, these lenses can replace a cataract-clouded lens with the goal of providing perfect distant vision. Whether the person will be able to read without glasses depends on whether the intraocular lens also provides near vision correction. If the person was nearsighted to begin with, the power of the intraocular lens will generally be less than the removed lens, as nearsightedness is corrected by reducing the optical power to lengthen the focal point.
To correct myopia, which is the inability to see distant objects clearly, a diverging lens is used to reduce the eye's power. Consequently, the cornea should be reshaped to have a smaller curvature. Hyperopia, on the other hand, is corrected by increasing the power of the eye with a converging lens, which involves creating a greater corneal curvature.