Prediction of refractive error in combined vitrectomy and cataract surgery with one-piece acrylic intraocular lens.
OBJECTIVE
To compare the predicted and actual refractive errors of hydrophilic, one-piece, C-flex 570C (C-flex) intraocular lens (IOL) implantation in simultaneous vitrectomy and lens extraction in various conditions.


METHODS
One hundred fifty-nine eyes of patients who had lens extraction between March 2004 and September 2005 were enrolled in a retrospective study. Group 1 had lens extraction and IOL implantation, and Group 2 had lens extraction and IOL implantation with vitrectomy. IOL calculation was done with axial length and keratometry measurements. The actual and predicted refractive errors were compared at 1 and 6 months postoperatively. The factors influencing the postoperative refractive outcomes were analyzed.


RESULTS
The mean refractive predictive error (i.e., the actual minus predicted spherical equivalent) was +0.19+/-0.39 D (Diopter) and -0.26+/-0.45 D at 1 and 6 months postoperatively (all: p<0.001) in group 1, and -0.22+/-0.39 D and -0.06+/-0.62 D at 1 and 6 months postoperatively (p=0.013, p=0.399 respectively). In group 2, all surgical factors related to refractive errors were not statistically significant (all: p>0.05).


CONCLUSIONS
Refractive errors in combined surgery showed myopic shift of -0.50 D and -0.32 D at 1 and 6 months postoperatively compared with C-flex IOL implantation alone. With the hyperopic tendency of IOL and myopic tendency of vitrectomy, the combined surgery made postoperative refractive errors near emmetropia.
Lee
Dong Kyu
DK
Department of Ophthalmology, Soonchunhyang University College of Medicine, Seoul, Korea.
Lee
Sung Jin
SJ
You
Yong Sung
YS
D000180:Acrylic Resins; D000368:Aged; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008875:Middle Aged; D018918:Phacoemulsification / Q000379:methods*; D012030:Refractive Errors / Q000175:diagnosis*; D012189:Retrospective Studies; D014821:Vitrectomy / Q000379:methods*
D000180:Acrylic Resins