Rotational stability and visual performance 3 months after bilateral implantation of a new toric extended range of vision intraocular lens.

In the trifocal group, 90% of patients were completely spectacle independent for near tasks in contrast to 75% in the ERV group, but differences between groups did not reach statistical significance. 18 In contrast to ERV or EDOF IOLs, which are designed to lengthen the focus of the eye resulting in one elongated focal point, 16 multifocal lenses use the principle of simultaneous vision in which the light is split into two or more focal points.

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