Special Intraocular Lenses For Small Incisions
Pp. 215-229 (15)
Irit Bahar, Yoav Nahum and Guy Kleinmann
The trend toward minimally invasive surgery has been introduced in many
fields of medicine, including ophthalmology. Cataract surgery has evolved over the last
few decades from very large incision intracapsular cataract extraction to mini- and
recently microincision cataract surgery (MICS) with an incision size of less than 2 mm.
Recent innovations in phacoemulsification and intraocular lens technology have
enabled this concept. Although cataract surgery can be performed through an incision
less than 1 mm long, most IOLs require an incision of more than 2.0 mm in length.
Most MICS-IOLs are constructed of one-piece hydrophilic acrylic material. They used
to have insufficiently sharp posterior optic edges and broad haptic-optic junctions that
compromised the optic-edge barrier effect. Improvements in those designs have
achieved better hydrophilic acrylic IOLs in terms of vision quality and prevention of
posterior capsular opacity. Recently, a hydrophobic three-piece IOL, which features a
slim haptic junction and a sharp optic edge, became available. This chapter reviews the
characteristics of recently introduced microincision IOLs.
Further investigation is needed to improve the IOL design to match the microincision
platform, without compromising vision quality.
Cataract surgery, phacoemulsification, small incision, IOL,
Department of Ophthalmology, Rabin Medical Center, Petach Tikva, Israel.