[Surgically induced astigmatism after micro and small clear temporal corneal incision in cataract surgery].
OBJECTIVE
To compare surgically induced astigmatism among 3 sizes of temporal corneal incisions in cataract surgery.


METHODS
A retrospective review was carried out of case records of 48 patients (64 eyes) who underwent cataract surgery. The length of the corneal incision was 1.6 mm in five eyes, 2.2 mm in 33 eyes, and 3.0 mm in 26 eyes. Astigmatism was measured by keratometry readings before and 1 week, 1 month, and 3 months after surgery. Surgically induced astigmatism was calculated by vector analyses using the Cravy method.


RESULTS
One week postoperatively, the mean surgically induced astigmatism was 0.00 +/- 0.69 diopter(D) in the 1.6 mm group, -0.05 +/- 0.61 D in the 2.2 mm group and 0.44 +/- 0.57 D in the 3.0 mm group. Three months after surgery, the mean surgically induced astigmatism was -0.05 +/- 0.08 D in the 1.6 mm group, -0.04 +/- 0.47 D in the 2.2 mm group and 0.47 +/- 0.59 D in the 3.0 mm group. The surgically induced astigmatism was significantly less in the 2.2 mm group than in the 3.0 mm group.


CONCLUSIONS
The amount of induced astigmatism was significantly less in temporal corneal micro-incision cataract surgery than in small incision surgery.
Tagawa
Kosaku
K
Department of Ophthalmology, Yatsuo General Hospital, Toyama, Japan. win@yatsuo.or.jp
Higashide
Tomomi
T
Sugiyama
Kazuhisa
K
Kawasaki
Kazuo
K
D000368:Aged; D000369:Aged, 80 and over; D001251:Astigmatism / Q000175:diagnosis / Q000209:etiology*; D002387:Cataract Extraction / Q000009:adverse effects* / Q000379:methods*; D003315:Cornea / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D019060:Minimally Invasive Surgical Procedures / Q000009:adverse effects* / Q000379:methods; D012189:Retrospective Studies