Intraocular Lenses

Is there a choice in the type of lens to be implanted in the eye?
  • The majority of the IOLs implanted are mono-focal. They can focus light rays from one particular distance only. Normally distance objects are clear and one needs glasses for reading.
  • Intra ocular lens can be rigid or foldable. The advantage of foldable lenses is that it can be inserted through a smaller wound.
Monofocal Aspheric IOLs
These IOLs additionally correct ‘higher order aberrations’ (especially spherical aberration), which cannot be otherwise corrected by spectacles. This improves the quality of vision and clarity especially in dim light condition.

Multifocal IOLs
  • Multifocal lenses are specially engineered and have different segments built onto the same lens. These segments focus light from both distant as well as near objects, allowing spectacle freedom for most activities.
Toric IOLs
  • Traditionally used monofocal IOLs correct only the spherical refractive error. Patients with pre existing astigmatism will need spectacle correction for distance vision and near. Toric IOLs eliminates the need of glasses for distance.
  • Recently multifocal IOLs have also been introduced with this option, thus correcting for distance, near and cylindrical error.
Trifocal IOLs
  • A limitation of standard multifocal IOLs is that they provide good distance and near vision but have a somewhat compromised intermediate vision. This is the distance used for working on computers. Trifocal IOLs provide excellent vision not only for near and far, but also for intermediate distances.
Toric Multifocal IOLs
  • Astigmatism is a refractive error in which the curvature of the cornea is different in different meridia. The shape is more akin to an American football rather than a regular football. People with astigmatism were earlier not suitable for multifocal IOLs. Now with the introduction of Toric Multifocal IOLs, it is possible to correct this astigmatism and also provide good near vision to this group of people.