Final answer:
The function of an Intraocular Lens (IOL) is to treat cataracts or correct myopia by focusing light onto the retina after replacing the eye's natural lens.
Step-by-step explanation:
The main function of an Intraocular Lens (IOL) implanted in the eye is to treat cataracts, which is the clouding of the natural lens, or to correct refractive errors such as myopia (nearsightedness). Hence, the correct answer is c) Treating cataracts or myopia. An IOL is implanted within the eye to replace the dysfunctional natural lens. This intraocular lens helps to focus light properly onto the retina, thereby restoring clear vision. For individuals with nearsightedness, an IOL with less optical power than the removed natural lens might be chosen to correct the vision, resulting in the ability to see distant objects clearly.
After an IOL implantation, some individuals might still require glasses for tasks like reading, depending on the type of IOL used and the individual's vision needs. Additionally, while IOLs are primarily used for treating cataract and myopia, they do not replace the cornea nor have any function in restoring retinal detachment. Instead, other surgical methods are used to treat corneal issues and retinal detachment.