The wide array of intraocular lenses (IOLs) commercially available today ma
kes it a formidable challenge to choose the most appropriate lens for the p
atient. Many wonder whether there truly are clinical differences among vari
ous IOLs. This update traces the evolution of IOLs in response to the wides
pread acceptance of phacoemulsification, and discusses the respective advan
tages and disadvantages of the IOLs available today based on clinical inves
tigations.