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 IOLs.Material and methods. A profound study of visual functions and assessment of visual quality of 90patients (mean age 63.3±1.2years) with partial cataracts and presbyopia. The studies were conducted before surgery and in late post-operative 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 IOLs 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 IOLs 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. In period from 12 to 24months 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. Intraocular 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.

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