1/5. Clear lens extraction with intraocular lens implantation for hyperopia.PURPOSE: Current surgical options for the correction of moderate to severe hyperopia include hyperopic laser in situ keratomileusis (LASIK), phakic intraocular lens implantation and clear lens extraction with intraocular lens (IOL) implantation. We investigate the safety and efficacy of clear lens extraction with IOL implantation to correct hyperopia. methods: phacoemulsification and IOL implantation was performed on 18 eyes of 10 patients. In 16 eyes, the Hoffer-Q formula was used for IOL power calculation and a single IOL was inserted; in the remaining 2 nanophthalmic eyes, the Holladay-II formula was used and two piggy-back IOLs were inserted. RESULTS: Mean preoperative spherical equivalent for distance was 6.17 D (range, 4.25 to 9.62 D). patients were followed postoperatively for a mean of 10.5 months (range, 4 to 27 mo). Uncorrected visual acuity in all eyes was 20/50 or better with a median uncorrected visual acuity of 20/40 (range, 20/30 to 20/50). Two patients lost 2 lines of spectacle-corrected visual acuity; both of these patients achieved spectacle-corrected visual acuity of 20/30. CONCLUSIONS: Clear lens extraction with IOL implantation is a safe and effective procedure for the correction of moderate to severe hyperopia in the presbyopic age range.- - - - - - - - - - ranking = 1keywords = extraction (Clic here for more details about this article) |
2/5. Refractive error in cataract surgery after previous refractive surgery.Bilateral cataract extraction with posterior chamber intraocular lens (IOL) implantation was performed in a patient after previous photorefractive keratectomy, radial keratotomy (RK) combined with astigmatic keratotomy, and retreatment of RK. Significant hyperopic error was observed after cataract surgery, and the IOLs were eventually exchanged in both eyes. A review of this case found that the refractive error was smaller when a refraction-derived keratometric value was selected for IOL power calculation. Nevertheless, hyperopic error still occurred.- - - - - - - - - - ranking = 0.14285714285714keywords = extraction (Clic here for more details about this article) |
3/5. Cataract surgery after holmium:YAG laser thermal keratoplasty.A 64-year old man had noncontact holmium:YAG (Ho:YAG) laser thermal keratoplasty (LTK) performed in the left eye on March 10, 1998, and in the right eye on January 11, 1999. The patient achieved 1.3 diopters (D) and 1.4 D of corneal steepening in the right and left eye, respectively, which was the desired amount as his refractive error before Ho:YAG LTK was low. At the 3-month postoperative examination of the left eye, cortical cataracts were observed in both eyes. Approximately 1 year later, bilateral cataract extraction was recommended because of patient-reported decreased vision at distance and near and difficulty with vision in the presence of glare. Cataract surgery and intraocular lens (IOL) implantation was performed in both eyes in August 1999 using the keratotomy readings taken after noncontact Ho:YAG LTK to calculate IOL power. Although slight flattening of the cornea occurred after cataract extraction, the refractive outcomes achieved by noncontact Ho:YAG LTK were generally preserved.- - - - - - - - - - ranking = 0.28571428571429keywords = extraction (Clic here for more details about this article) |
4/5. Surgery for 4 refractive errors in 1 patient.We report a case of cataract extraction with implantation of a multifocal intraocular lens (IOL) after photorefractive keratectomy for myopia and astigmatism and subsequent laser thermal keratoplasty for surgically induced hyperopia. Good refractive results were obtained using standard biometry techniques for calculation of the IOL power.- - - - - - - - - - ranking = 0.14285714285714keywords = extraction (Clic here for more details about this article) |
5/5. Accommodative intraocular lens tilting.PURPOSE: To report an unusual complication of accommodative intraocular lens (IOL) implantation after clear lens extraction for hyperopia correction. DESIGN: Observational case report. METHOD: A 48-year-old woman underwent clear lens exchange for the correction of moderate hyperopia. A Crystalens Model AT-45 Accommodating Posterior Chamber IOL (AT-45 IOL) was implanted to allow optimal distance and near vision. At the 3-week follow-up appointment, she complained of monocular diplopia. Ocular examination showed an increased astigmatism, causing decreased visual acuity. Scheimpflug Pentacam Image and Wave Front Analysis supported the diagnosis of IOL tilting. RESULTS: IOL repositioning was unsuccessful because of fibrosis of the haptics. It was necessary to replace AT 45 IOL with a monofocal acrylic sulcus-fixated IOL. CONCLUSION: Control of capsular fibrosis should be a major concern, especially in this type of IOL. Accommodating IOL exchange appears to be a safe alternative to manage this complication.- - - - - - - - - - ranking = 0.14285714285714keywords = extraction (Clic here for more details about this article) |