ABSTRACT
PURPOSE: Retrospective evaluation of PC IOL power calculation accuracy and comparison of the refractive errors after ECCE resulted from different methods of calculation. MATERIAL AND METHODS: The PC IOL power in 100 eyes with senile cataract without significant refractive errors, was calculated using SRK II formula with two different biometers and based on primary refraction. The final IOL power was established by surgeon based on all mentioned calculations (surgeon choice). Half a year after surgery the refractive error was measured. The proper IOL power, which did not require additional correction, was calculated (ideal lens). RESULTS: 48 eyes did not require any distance correction. In 44 eyes small hyperopia (to +2.0 D) appeared and in 8 eyes myopia (to -1.5 D). The smallest error was made in cases where we implanted lenses according to surgeon choice. The average power of ideal lens was 20.32 D. We observed statistically significant difference between both ultrasound biometers. CONCLUSIONS: The most accurate results were achieved in cases where IOL power was chosen by the surgeon based on SRK II formula and primary refraction. Possible source of errors can be inadequate indications of biometers.
Subject(s)
Cataract Extraction/methods , Lenses, Intraocular , Refractive Errors/diagnosis , Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Predictive Value of Tests , Regression Analysis , Retrospective Studies , Time Factors , Visual AcuityABSTRACT
PURPOSE: To compare the heparin-surface-modified and the regular polymethylmethacrylate posterior chamber intraocular lenses regarding cellular reactions one year after extracapsular cataract extraction. MATERIAL AND METHODS: 62 patients of either sex, with senile cataract, without diabetes and any preoperative pathology of the eye, were included in the study. 30 patients received HSM PMMA PC IOL and 32 patients received unmodified PMMA PC IOL. All patients had a standard extracapsular cataract extraction. At the examination after one year the best corrected visual acuity was defined, anterior segment of the eye was evaluated biomicroscopically, cell deposits were assessed and the state of posterior capsule was noticed. RESULTS: One year postoperatively all patients in both groups had the best corrected visual acuity better than 0.5. Significantly fewer eyes with the HSM PMMA PC IOLs had cell deposits on the anterior surface of the lens (20% vs. 37.5%). The amount of cell deposits per patients was small. Irregularity of the pupil with presence of posterior synechias did not differ significantly between the groups. The percentage of patients with clear posterior capsule was greater in the group with implanted heparin-modified artificial lenses. CONCLUSION: The study suggests that heparin-surface-modified posterior intraocular lenses result in less postoperative cellular response observed one year after extracapsular cataract extraction.
Subject(s)
Cataract Extraction , Coated Materials, Biocompatible , Heparin , Lens Implantation, Intraocular , Lenses, Intraocular , Polymethyl Methacrylate , Aged , Aged, 80 and over , Female , Follow-Up Studies , Humans , Lens, Crystalline/pathology , Male , Middle Aged , Surface Properties , Visual AcuityABSTRACT
PURPOSE: Evaluation which of the lenses: monofocal, bifocal or progressive, assure the best visual acuity in patients. MATERIAL AND METHODS: 86 patients aged from 21 to 84 years were operated. Monofocal lenses were implanted in 30 cases, bifocal in 32 and progressive in 24 cases. RESULTS: In 90% of patients with monofocal lenses and over 90% of patients in the remaining groups full uncorrected or corrected distance visual acuity was achieved. In groups with bifocal and progressive lenses full near visual acuity without correction, or with the same correction as for distance, was achieved by respectively 65.5% and 75% of patients. CONCLUSIONS: In all three groups very good distance visual acuity was achieved. The best near visual acuity is assured by progressive lenses, in lower degree by bifocal lenses.
Subject(s)
Cataract Extraction/methods , Lens Implantation, Intraocular/methods , Postoperative Care , Visual Acuity/physiology , Adult , Aged , Aged, 80 and over , Humans , Middle Aged , Treatment OutcomeABSTRACT
PURPOSE: Assessment of the density of endothelial cells after usage of gentamicin in irrigation-aspiration fluid. MATERIAL AND METHODS: 60 patients subjected to extracapsular cataract extraction with intraocular lens implantation. In 30 eyes irrigation was performed with Ringer fluid (group I) and in 30 eyes Ringer fluid with gentamicin (group II) 4 mg gentamicin were added to 500 ml of Ringer fluid obtaining the concentration 8 micrograms/ml. Evaluation of endothelial cells density was carried before operation, 1 month and 6 months after. RESULTS: Percentage endothelial cells loss in group I was 7.8% 1 month postoperatively and 14.5% 6 months after operation and in group II 8.5% and 14.87%, respectively. CONCLUSION: Gentamicin added to irrigation-aspiration fluid doesn't cause enhanced endothelial cells loss during extracapsular cataract extraction.
Subject(s)
Anti-Bacterial Agents/pharmacology , Cataract Extraction/methods , Endothelium, Corneal/drug effects , Gentamicins/pharmacology , Aged , Humans , Lens Implantation, Intraocular/methods , Therapeutic Irrigation/methodsABSTRACT
PURPOSE: Comparison of endothelial cells density in eyes after PMMA and heparin-surface-modified lenses (HSfM1) implantation. MATERIAL AND METHODS: 58 patients (26 male and 32 female) aged from 36 to 89 years. In 30 patients PMMA lenses produced by Pharmacia, Storz and Alcon and in 28 HSM (Pharmacia) lenses were implanted, after ECCE. RESULTS: Percentage loss of endothelial cells in eyes with PMMA lenses was 8.61% after month and 13.56% 6 months post-operatively. In eyes with HSM lenses endothelial cell loss was 8.44% and 13.55% respectively. CONCLUSION: Loss of corneal endothelial cells in eyes with PMMA lenses is almost the same in eyes with HSM lenses.
