Davison J A
Wolfe Clinic, P.C., Marshalltown, Iowa 50158.
J Cataract Refract Surg. 1993 Jan;19(1):3-8. doi: 10.1016/s0886-3350(13)80271-4.
Postoperative keratometric astigmatism was analyzed in 276 consecutive cases of phacoemulsification and posterior chamber lens implantation performed by one surgeon. The series was divided into two groups: one received 4.0 mm incisions and the other 5.5 mm incisions. Incision design was triplanar and required suture closure, i.e., all wounds were closed with two X-pattern 10-0 nylon sutures. Using the Cravy method, an insignificant difference in induced astigmatism was found between the groups at one day, two weeks, and one year after surgery. The average induced diopters of astigmatism for the 4.0 mm group was +0.80 +/- 0.94 at one day, +0.49 +/- 0.73 at two weeks, and -0.34 +/- 0.91 at one year; for the 5.5 mm group it was +0.69 +/- 1.07 at one day, +0.41 +/- 0.85 at two weeks, and -0.23 +/- 1.01 at one year. Two-week uncorrected visual acuity of 20/40 or better was similar for both groups. Seventy-six percent of the 4.0 mm group and 68% of the 5.5 mm group had acuities of 20/40 or better. A significant difference in the incidence of immediate postoperative hyphema was noted. The overall hyphema incidence was 9%, with a 14% and 4% incidence for 5.5 mm and 4.0 mm incisions, respectively.
对由一位外科医生连续实施的276例白内障超声乳化吸除联合后房型人工晶状体植入术患者的术后角膜散光情况进行了分析。该系列病例被分为两组：一组采用4.0毫米切口，另一组采用5.5毫米切口。切口设计为三平面且需缝合关闭，即所有伤口均用两根10-0尼龙缝线以X形缝合。采用Cravy方法，发现在术后1天、2周和1年时，两组间诱导散光无显著差异。4.0毫米组术后1天、2周和1年时诱导散光的平均屈光度分别为+0.80±0.94、+0.49±0.73和-0.34±0.91；5.5毫米组分别为+0.69±1.07、+0.41±0.85和-0.23±1.01。两组术后2周未矫正视力达到20/40或更好的情况相似。4.0毫米组中76%的患者和5.5毫米组中68%的患者视力达到20/40或更好。术后即刻前房积血的发生率存在显著差异。总体前房积血发生率为9%，5.5毫米切口组和4.0毫米切口组的发生率分别为14%和4%。
