The disadvantage of these lenses is that as the limited space on multifocal IOLs must be divided into zones, some advantages of seeing through just one zone in single vision lenses are lost, such ascontrast sensitivity.This determines how well the eye can see in low light and how well it can distinguish objects from similarly colored backgrounds.
Most people require reading glasses as they reach middle age for this reason.However the Crystalens may not provide such a range of focus as a multifocal lens and therefore reading glasses may still be required.Also, there are other side effects associated with Crystalens, such as astigmatism, which can happen if the lens shifts position in the eye during the healing process.Accommodating IOLs can be used in refractive cataract surgery for cataract patients or they can be used in refractive lens exchange (RLE) for people who don't have cataracts, but want lens-based vision correction surgery to reduce the need for reading glasses.Accommodating IOLs reduce the need for reading glasses by increasing the magnifying power of the eye in response to focusing effort (a process called accommodation).But these lenses work differently than the eye's natural lens.
The natural lens of the eye is flexible and capable of changing shape in young persons.
When it relaxes, it allows the lens to reshape and focus on intermediate objects.
Crystalens is known as a 'Premium Intraocular Lens' and is particularly suited to those over the age of 40 who have presbyopia.
The high-definition Crystalens HD also creates less glare or halos with bright lights.
In clinical studies, 80% patients who underwent cataract surgery and received a Crystalens implant achieved 20/20 vision or better vision, which is impressive.
Disclaimer: Each patient has unique visual characteristics and requires the consultation of a qualified eye surgeon before determining what treatment modality is best.