[Is cranial corneoscleral 6 mm "no-stitch" tunnel incision contraindicated in against-the-rule astigmatism?].
BACKGROUND
There is a risk to increase a preexisting astigmatism against the rule by performing the incision at the 12 o'clock position.


METHODS
In the prospective study 15 patients with a preoperative astigmatism over 0.25 D axis 90 degrees +/- 15 degrees the first cataract extraction was performed by a cranial, the operation of the other eye by a temporal 6-mm no-stitch tunnel incision.


RESULTS
The mean corneal astigmatism against the rule preoperatively was 1.02 +/- 0.5 D with cranial incision and 1.27 +/- 0.8 D with temporal incision. Postoperatively the corneal astigmatism was 2.18 +/- 0.9 D with cranial incision and 0.71 +/- 0.7 D with temporal incision. In comparison to the pre-existing astigmatism, there was an increase of the astigmatism with cranial incision more than double, with temporal incision the astigmatism was significant lowered. Postoperatively the astigmatism with temporal wound location was significant lower than with cranial incision.


CONCLUSIONS
Under the aspect of a 1.5 D higher average astigmatism postoperatively, we conclude that a cranial 6-mm no-stitch tunnel incision in preoperative astigmatism against the rule is contraindicated.
Weindler
J
J
Augenklinik und Poliklinik, Universität des Saarlandes.
Spang
S
S
Weik
R
R
Ruprecht
K W
KW
D000368:Aged; D000369:Aged, 80 and over; D001251:Astigmatism / Q000601:surgery*; D002387:Cataract Extraction; D000075202:Contraindications; D005260:Female; D006801:Humans; D008297:Male; D011183:Postoperative Complications / Q000209:etiology; D011446:Prospective Studies; D012029:Refraction, Ocular; D012307:Risk Factors; D013536:Suture Techniques; D014945:Wound Healing / Q000502:physiology
Ist eine kraniale korneosklerale 6 mm "No-stitch"-Tunnelinzision bei einem Astigmatismus gegen die Regel kontraindiziert?