Final answer:
The initial power for Clariti 1 day multifocal lenses is primarily determined by an individual's refractive error and visual acuity needs. This selection is crucial to ensure the lenses correct both distance and near vision effectively.
Step-by-step explanation:
The primary consideration when selecting the initial power for Clariti 1 day multifocal lenses is B) Refraction and visual acuity needs. When correcting vision with contact lenses, the individual's refractive error and the required visual acuity for both distance and near must be considered to determine the appropriate lens power.
Regarding the specific questions about contact lenses and vision correction:
- The power of the tear layer between the cornea and the lens for a mildly farsighted person with a prescription of 0.750 D and a near point of 29.0 cm would need to be calculated considering the refractive power required to bring the near point into focus.
- A myopic person with a contact lens prescription of -4.00 D would have a far point that corresponds to the distance at which objects are in focus without additional correction.
- For a person who has undergone LASIK, the range of diopters for spectacle lenses required post-procedure can be calculated taking into account the uncertainty range of the LASIK correction, which in this case is ±5.0% based on the 9.00 D correction made to the eye.
Furthermore, the ability to read without glasses after cataract surgery with intraocular lens implantation depends on various factors including the design of the intraocular lens and the presence of presbyopia.