A retrospective study of 1,073 cases of intraocular lens implantation

A retrospective study of 1,073 cases of intraocular lens (10L) implantation since the first 4-loop intraocular lens implant in 1978 was conducted. Visual acuity, refraction, keratometry, photo-keratoscopy, BFE test, specular microscopy, tonometry, slitlamp examination and ultrasonic pachometry were routinely included in the preoperative and postoperative examinations for prospective study. Posterior chamber lenses accounted for 93.2% of all intraocular lenses implanted. The mean spherical equivalent of refraction (N=667) was -0.99D at 3months postoperative during the two years. A three month follow-up visual acuity of 20/30 or better was obtained in82% of the cases. The average endothelial cell loss was 14.7% in the posterior chamber lens implant group and 26.2% in the anterior chamber lens implant group resfectively at the three month follow-up examination. IOL-related postoperative complications such as iris-capture, IOL dislocation, posterior iris synechia, and pseudophakic glaucoma were minimal in number.

The Change of the Corneal Curvature After Cataract Extraction

The changes of corneal curvatures were measured in 63 cataract cases before and 2 months after cataract extraction with the aid of ophthalmometer and photo keratoscope. The change of the cornea in the vertical curvature was shown to be greater than that of horizontal curvature, in cases of conventional large corneal incision(120-170 degrees) of cataract surgery. Vertical curvature of the cornea was decreased and horizontal curvature was increased. The corneal astigmatism before and 2 months after surgery were respectively 0.67D. and 1.56D. showing the difference of 0.89D.