Clinical results of monolateral and bilateral implantation of accommodative IOL Crystalens HD500.
The study is aimed at assessing clinical results of presbyopia correction with Crystalens HD 500 IOL. Visual functions and patients' satisfaction after bilateral and monolateral implantations were compared. 25 presbyopic patients with an average age of 64.57±2.56 years (39 eyes) were examined after Crystalens HD500 IOL implantation, of which 14 patients received bilateral (group 1) and 11 monolateral implantation(group 2). Distant uncorrected visual acuity (UCVA) on the fellow eye was 0.8 or higher. IOL power was calculated using SRK-T and Hollyday II formulas. The follow-up period was 6 to 12 months. The postoperative refraction was ±0.5 D. By the 6th month, binocular and monocular UCVA for distant and intermediate vision reached 0.5 in all patients. 72% of patients of both groups had distant UCVA of 0.8 or higher. A significant difference was marked for near UCVA, where in the binocular case 92.4% patients had UCVA of 0.5 or higher but for the monocular case only 61.4% patients reached this UCVA value. Group 1 patients were not dependent on spectacles in 90.8% cases, whereas the figure for group 2 was 69.5%. 42% of all patients complained of glare and halos under cycloplegia. It is concluded that Crystalens HD 500 IOL implantation is an efficient, safe and predictable surgery for presbyopia correction. Bilateral implantation was shown to provide a better visual acuity at all distances. // Russian Ophthalmological Journal, 2011; 4:8-11.