FEATURES OF VISUAL PERCEPTION IN PATIENTS WITH PRESBYOPIA, DEPENDING ON THE TYPE OF INTRAOCULAR CORRECTION

Abstract

Purpose. To assess the long-term results of presbyopia correction in patients with primary cataract depending on type of implantable lOLs. Material and methods. A profound study of visual functions and assessment of visual quality of 90 patients (mean age 63.3 ± 1.2 years) with partial cataracts and presbyopia. The studies were conducted before surgery and in late postoperative period after bilateral cataract phacoemulsification with implantation of different models IOLs that provide a high visual acuity in distance and at close range. Results. Bilateral implantation of monofocal lOLs for monovision principle leads to a significant increase in far visual acuity of leading the eye and near visual acuity of slave eye. However, patients need long-term adaptation to artificial anisometropia. As a result of bilateral implantation of accommodating lOLs a significant improvement in visual acuity at distance and near occurs. Surgical treatment provides best visual quality of patients up to 6 months after surgery. ln period from 12 to 24 months after surgery, there was a decrease of visual functions as a result of fibrosis of capsular bag. The correction of presbyopia by creating a multifocal optical system as a result of bilateral multifocal refractive IOL implantation leads to a stable improvement of visual acuity at far and close distance. But thus the contrast sensitivity deteriorates, especially in low- and high-frequency ranges. Conclusion. lntraocular correction of presbyopia is a highly effective method of treatment, allowing obtaining high visual acuity in distance and at close range. However, the results depend on chosen strategy of intraocular correction