[Functional evaluation of a new type of intraocular lens: Domilens type PROGRESS 1]

This study presents the first clinical and functional results on the implantation of a new multifocal IOL model, the Domilens type PROGRESS 1. A group of 20 patients underwent extracapsular extraction of cataract with continuous circular capsulorhexis and IOL implantation in the capsular bag. In 65% of the cases, final visual acuity from a far distance proved to be greater than or equal to 8/10 without correction, while visual acuity from a short distance was J2 without the need of additional lenses. BAT identified a decrease in visual acuity of 0.01 Snellen lines at a medium lighting level and 0.05 at the maximum level. The perimetric results obtained with the C 30-2 threshold programme of the Humphrey field analyzer showed a foveal sensitivity threshold of 32.5 dB +/- 9.25 dB and a mean defect of -2.22 dB +/- 2.90 dB. The Vistech VCTS 6500 underlined a decrease in the sensitivity to space frequency contrast of 6.0 c/d versus a control group of patients with monofocal IOL (P < 0.05). This reduction involved a wider range of space frequencies (3.0, 6.0, 12.0 c/d) in comparison with a group of phakic subjects (P < 0.05). With the on-off PEV patterns, a slight decrease in contrast sensitivity threshold was found versus patients with monofocal IOL statistically non significant (P > 0.05). At a medium space frequency of 2.33 c/d, a decrease in contrast sensitivity versus phakic subjects (P < 0.05) was observed. Depth of focus went from infinite to 19 cm. from the eye.