[Prediction of postoperative refraction using intraoperative retinoscopy].
OBJECTIVE
Postoperative refraction was calculated using aphakic refraction measured with intraoperative retinoscopy, and its clinical usefulness was investigated statistically.


OBJECTIVE
We studied 115 eyes of 89 patients, 28 males and 61 females aged 35 to 90 years, who had received intracapsular insertion of an intraocular lens. To decrease the error in measuring, retinoscopy was performed after the attachment of a hard contact lens of +15 D to the patient's cornea, with the exclusion of high myopia. We modified the Haigis calculation and used it to predict the postoperative refraction.


RESULTS
The refraction could be measured in 112 eyes. The mean error between the actual and the predicted (actual minus predicted) in 112 eyes was 0.40 +/- 1.05 (mean +/- standard deviation) D. The mean error calculated using the SRK-II method, the Binkhorst method, and the Holladay method was -0.09 +/- 1.13 D, -0.58 +/- 1.00 D, and -0.44 +/- 1.00 D, respectively. The mean error of the average of these three formulas and our method was 0.15 +/- 0.82 D, -0.09 +/- 0.83 D, and -0.02 +/- 0.82 D, respectively.


CONCLUSIONS
Our method seemed to have the same accuracy as other calculation formulas. By using our method together with other formulas, the postoperative refraction could be predicted more accurately.
Iwami
S
S
Department of Ophthalmology, Iwate Prefectural Kitakami Hospital, Japan.
Senoh
K
K
Yoshida
A
A
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002387:Cataract Extraction; D005260:Female; D006801:Humans; D007432:Intraoperative Period; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D012029:Refraction, Ocular