The refractive error after implantation of a posterior chamber intraocular lens

Abstract

The study included 188 patients, in which a posterior chamber intraocular lens was implanted after extracapsular cataract extraction. After modifications of the intraocular lens constants (SRK formula and SRK II formula) and correction of the axial length measurements (Colenbrander-Hoffer formula) had been made, the mean differences between the actual postoperative spherical equivalent and that predicted by the three formulas were -0.23D, -0.22D and -0.46D, respectively. More than +/-1.0D deviation from the predicted postoperative refraction occurred in about one-third of the cases. Inter-observed discrepancy regarding the accuracy of the preoperative measurement of the ocular axis length is suggested to be the main cause of unpredicted postoperative refractive errors.

Resolving Refractive Error After Cataract Surgery: IOL Exchange, Piggyback Lens, or LASIK

“…Currently, the most common postoperative problems have been reduced to refractive inaccuracies. [2][3][4]16 Postoperative induced astigmatism is usually the most undesired surprise after cataract surgery, although the use of microincisional surgery has significantly improved the control of postoperative astigmatism. 17,18 Refinement of the refractive outcomes after cataract surgery with excimer laser has been widely described as an effective and safe method.…”

Outcomes of excimer laser enhancements in pseudophakic patients with multifocal intraocular lens

“…Despite advances in IOL formulas and surgical and biometric techniques, unintended postoperative ametropia cannot be always eliminated. Common causes of undesired refractive error include inaccuracies in preoperative measurements or biometric calculations, 1 – 3 variations in lens formulas, 4 , 5 incorrect selection of IOL power, 6 manufacturing precision, or postoperative positional changes. 1 , 6 …”

Managing residual refractive error after cataract surgery

“…[10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] Yet even in the hands of the most experienced and meticulous surgeon, refractive surprises can occur due to myriad factors. [26][27][28][29] Reviewing currently available modalities for the management of pseudophakic refractive error may be of timely interest to today's cataract surgeon. This review comprises 3 sections.…”