Final answer:
Both Ortho-K and soft multifocal lenses could be effective for myopia control in a prescription of -9.00 DS. The patient with this prescription was nearsighted, as myopia causes distant objects to be blurry. Both options are considered good, but the final decision should involve an eye care professional.
Step-by-step explanation:
The student is asking about options for myopia control with a prescription of -9.00 DS. Both Ortho-K (orthokeratology) and soft multifocal (mf) lenses could be effective options for myopia control. Ortho-K involves wearing specially designed rigid contact lenses overnight to temporarily reshape the cornea and correct myopia, while soft multifocal lenses are designed to be worn during the day and can slow the progression of myopia. The choice between these options can depend on a variety of factors, including the patient's age, lifestyle, and the specific characteristics of their myopia. Therefore, option C, 'Both are good options', could be a suitable answer. However, the decision should always be made in consultation with an eye care professional.
The myopic prescription indicates that the individual was nearsighted before any corrective procedure since myopia is characterized by the eye's focal point falling short of the retina, causing distant objects to appear blurry. This is confirmed by the fact that a -9.00 DS prescription is used to correct for nearsightedness.