Corneal Astigmatic Changes by Temporal Incision or Oblique Incision in Sutureless Cataract Surgery

We analyzed postoperative astigmatic changes according to the location of incision in 129 eyes that sutureless cataract surgeries were performed. We followed up the astigmatic changes until six months postoperatively, and compared the results of two groups of which the one is the preoperative against-the-rule astigmatic cases with superior incisions and temporal incisions, the other is the preoperative oblique astigmatic cases with superior incisions and superotemporal incisions. In the preoperative against-the-rule astigmatic cases, postoperative astigmatic changes were shifted toward against-the-rule astigmatism(0.23 diopters) in superior incisions and toward with-the-rule astigmatism(0.20 diopters) in temporal incisions until 6 months following surgery(p0.05). Surgically induced astigmatisms were less in superotemporal incisions than superior incisions (p<0.01) and corneal astigmatisms were stabilized after one month postoperatively in both groups(p<0.05). These results demonstrated that surgically induced astigmatisms were decreased by the incision at steep axis, and in the cases of preoperative againstthe rule astigmatism, the preexisting astigmatisms were decreased by the temporal incisions.

Astigmatic Changes According to Incision Length After Sutureless Cataract Surgery

We analyzed an astigmatism and an uncorrected visual acuity in 235 eyes for 6 months following sutureless cataract surgery(167 eyes) with 5 mm(Group 1), 6 mm(Group 2), and 7 mm(Group 3) incision lengths at 2.5 mm posteriorly from the corneoscleral limbus, and shoelace sutured cataract surgery(68 eyes) with 7 mm(Group 4) incision length at 1 mm posteriorly from the corneoscleral limbus performed by one surgeon. In three groups of sutureless cataract surgery, the surgically induced corneal astigmatisms were stable after one month postoperatively, but decreasing the length of incision substantially reduced the astigmatic changes(p>0.05), the astigmatic swings(p>0.05) and the astigmatic ranges. In comparison to sutured cataract surgery with 7 mm incision length, sutureless cataract surgery with same incision length reduced the astigmatic changes(p0.05) was noted. In comparison to sutured catarct surgery with 7 mm incision length, suture less cataract surgery with same incision length had higher incidence of an uncorrected visual acuities of 20/40 or better(p0.05) and a better uncorrected visual acuity(p>0.05). And sutureless cataract surgery rather than sutured cataract surgery was associated with a lower surgically induced astigmatism(p<0.01), an earlier stability, and a better uncorrected visual acuity(p<0.01).

Posterior Chamber Intraocular Lens Implantation in High Myopia

We evaluated pseudophakia in high myopic patients whose an axial lenght were 26mm and over. Cataract surgery was performed with ECCE and posterior chamber intraocular lens implantations from May 1986 to May 1991 on 69 patients (80 eyes). The results were as follows; 1. Most myopic patients were good candidates for posterior chamber intraocular lens implantation regardless of axial length. 2. Posterior chamber intraocular lens implantations in high myopia were a good refractive surgery. 3. The theoretical formula had better predictabilized than the empirical formula in apredictive accuracy.