[PMMA lens implantation in sutureless corneal cataract surgery].
BACKGROUND
Self-sealing corneal cataract procedures have been known since 1992 and are recommended for foldable silicon lenses. Our goal was a technical modification without refractive disadvantages, which would also allow for the implantation of more rigid, but less expensive PMMA lenses of high optical quality.


METHODS
The "scleral stretch incision" by Freeman (1991) was applied to the corneal situation by widening the inner wound lip up to 6.5 mm; this makes it possible to implant a 5 mm optic through an outer wound opening of 4-4.2 mm. This method has been used since October 1992 on 980 patients, whereby the lamellar corneal incision was placed 1.5-1.8 mm deep to compensate for the astigmatism, if possible in the steeper meridian.


RESULTS
The first 107 cases were followed up for longer than 6 months; they showed a surgically induced astigmatism of 1.18 +/- 0.79 D and a postoperative astigmatism of 0.86 +/- 0.70 D. Neither postoperative infection nor hypotony was observed in any of the cases.


CONCLUSIONS
The modified corneal tunnel incision is recommended for 5 mm PMMA lenses; this is especially suited for cases of low to midgrade preoperative astigmatism that can be optimally improved by this procedure. In cases of pure spheric refraction, a 3 to 3.5 mm incision with foldable lens implantation is preferred.
Müller-Jensen
K
K
Augenklinik des Städtischen Klinikums Karlsruhe.
Barlinn
B
B
D000368:Aged; D000369:Aged, 80 and over; D001251:Astigmatism / Q000209:etiology; D002387:Cataract Extraction / Q000379:methods*; D003315:Cornea / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007910:Lenses, Intraocular; D008297:Male; D008768:Methylmethacrylates; D008875:Middle Aged; D011183:Postoperative Complications / Q000209:etiology*; D013536:Suture Techniques; D014945:Wound Healing / Q000502:physiology
D008768:Methylmethacrylates
PMMA-Linsen-Implantation in der nahtfreien kornealen Kataraktchirurgie.