A transparent, biconvex structure in the eye of a vertebrate or cephalopod that is located between the iris and the vitreous humor and focuses light rays entering through the pupil to form an image on the retina.
Intraocular lenses (IOLs) are medical devices that are implanted inside the eye to replace the eye’s natural lens when it is removed during cataract surgery.
An accommodating intraocular lens (IOL) allows a patient to see at different distances without needing to worry about using glasses or readers.
As we age, this the lens begins to lose some of its flexibility, making it harder to change focus quickly.
In other words, the eye’s natural lens is aspheric (“not spherical”). A spherical intraocular lens can induce minor optical imperfections called higher-order aberrations (HOAs), which can affect quality of vision, particularly in low-light conditions such as driving at night.