Astigmatic equivalence of 2.2-mm and 1.8-mm superior clear corneal cataract incision.
OBJECTIVE
To evaluate the astigmatic effects of 2.2-mm and 1.8-mm cataract incisions.


METHODS
A randomized prospective study of 190 eyes of 151 patients undergoing superior clear corneal incision (SCCI) was divided into three groups: 61 eyes with a control 3.2-mm SCCI; 66 eyes with a 2.2-mm SCCI; and 63 eyes with a 1.8-mm SCCI. The corneal astigmatism was measured with an autokeratometer preoperatively and 1 month after surgery. The with-the-wound (WTW), against the-wound (ATW), and WTW-ATW changes were calculated using the Holladay-Cravy-Koch formula.


RESULTS
The WTW, ATW, and WTW-ATW changes were significantly higher for the control 3.2-mm SCCI than for the 2.2- and 1.8-mm SCCI (all p < 0.001), and no difference was found between the 2.2- and 1.8-mm SCCI incision groups.


CONCLUSIONS
In our study, the astigmatic effects were the same for the 2.2 mm and 1.8 mm incisions and as expected, were significantly lower than the control 3.2 mm incision group.
Rothschild Foundation, 25 rue Manin, 75019, Paris, France, jlfebbraro@fo-rothschild.fr.
Jean-Luc
JL
Febbraro
Li
L
Wang
Edmondo
E
Borasio
Lorenzo
L
Richiardi
Hamza N
HN
Khan
Alain
A
Saad
Damien
D
Gatinel
Douglas D
DD
Koch
D000368:Aged; D001251:Astigmatism / Q000175:diagnosis / Q000209:etiology*; D003315:Cornea / Q000601:surgery*; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D008297:Male; D008866:Microsurgery / Q000009:adverse effects* / Q000379:methods; D018918:Phacoemulsification / Q000009:adverse effects* / Q000379:methods; D011446:Prospective Studies