[Comparison of surface light scattering of acrylic intraocular lenses made by lathe-cutting and cast-molding methods--long-term observation and experimental study].
OBJECTIVE
To compare the long-term clinical and experimental results of soft acrylic intraocular lenses(IOLs) manufactured by the lathe-cut(LC) method and by the cast-molding(CM) method.


METHODS
This was a retrospective study of 20 patients(22 eyes) who were examined in a 5- and 7-year follow-up study. Sixteen eyes were implanted with polyacrylic IOLs manufactured by the LC method and 6 eyes were implanted with polyacrylic IOLs manufactured by the CM method. Postoperative measurements included best corrected visual acuity, contrast sensitivity, biomicroscopic examination, and Scheimpflug slit-lamp images to evaluate surface light scattering. Scanning electron microscopy and three-dimensional surface analysis were conducted.


RESULTS
At 7 years, the mean visual acuity was 1.08 +/- 0.24 (mean +/- standard deviation) in the LC group and 1.22 +/- 0.27 in the CM group. Surface light-seatter was 12.0 +/- 4.0 computer compatible tapes(CCT) in the LC group and 37.4 +/- 5.4 CCT in the CM group. Mean surface roughness was 0.70 +/- 0.07 nm in the LC group and 6.16 +/- 0.97 nm in the CM group.


CONCLUSIONS
Acrylic IOLs manufactured by the LC method are more stable in long-termuse.
Nishihara
Hitoshi
H
Department of Ophthalmology, Fujigaoka Hospital, Showa University School of Medicine, 1-30 Fujigaoka, Aoba-ku, Yokohama 227-8501, Japan.
Ayaki
Masahiko
M
Watanabe
Tomiko
T
Ohnishi
Takeo
T
Kageyama
Toshiyuki
T
Yaguchi
Shigeo
S
D000180:Acrylic Resins; D000368:Aged; D001672:Biocompatible Materials; D002387:Cataract Extraction; D005500:Follow-Up Studies; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular / Q000009:adverse effects / Q000592:standards; D008027:Light; D008875:Middle Aged; D012189:Retrospective Studies; D012542:Scattering, Radiation; D013997:Time Factors; D014792:Visual Acuity
D000180:Acrylic Resins; D001672:Biocompatible Materials