Final answer:
Current studies to slow the progression of myopia use orthokeratology lenses, bifocal contact lenses, multifocal eyeglasses, and aspherical contact lenses.
Step-by-step explanation:
To slow the progression of myopia, current studies use several methods, including orthokeratology lenses, bifocal contact lenses, multifocal eyeglasses, and aspherical contact lenses.
Orthokeratology lenses, also known as ortho-k lenses, are custom-fitted contact lenses that reshaped the cornea during sleep, temporarily correcting myopia.
Bifocal contact lenses and multifocal eyeglasses have different zones for near and distance vision, which provides simultaneous clear vision and helps slow the progression of myopia.
Aspherical contact lenses have a more complex shape than traditional spherical lenses, which reduces the peripheral specific optical power and induces peripheral myopic defocus, slowing the progression of myopia.