Profile of a new extended range-of-vision IOL: a laboratory study

Abstract

Purpose To evaluate the surface profile of a new-generation extended range-of-vision intraocular lens (IOL) and to compare it with that obtained for a monofocal IOL based on the same platform. Methods Prospective, experimental, laboratory study comparing the surface profile of the DFT015 (AcrySof IQ Vivity; Alcon Laboratories, Inc.), a new-generation presbyopia-correcting IOL, with the profile of the SN60WF (AcrySof IQ; Alcon Laboratories, Inc.), an aspheric monofocal IOL based on the same platform. Raw profiles were obtained using contact profilometry. The best-fit form was then subtracted from each raw profile to highlight potential differences. Results No significant differences were appreciated in raw profiles. On the contrary, after form removal, the new extended range-of-vision IOL showed a peculiar profile characterized by the presence of two altitudinal symmetrical changes in the order of 1 µm, localized in the central portion of the optic. Conclusions The new-generation extended range-of-vision IOL evaluated showed a smooth change of its surface compared to the same platform monofocal IOL. The altitudinal changes blended in the central design of the new presbyopia-correcting IOL, although micrometric, might play a crucial role in creating a continuous focal range while minimizing visual disturbances.

Automated and subjective refraction with monofocal, multifocal, and EDOF intraocular lenses: review

“…45 This lens yielded 2.0 D of pseudoaccommodation in clinical studies, but the change in the aberration profile of the central area was evident only when measured by ray tracing. 46–48 The mean DIFFref was −0.33 D and −0.09 D in the 2 available studies. 46,47…”

Visual Performance of Eyes with Residual Refractive Errors after Implantation of an Extended Vision Intraocular Lens

“…The lens has a central 2.2-mm optical zone, containing two nondiffractive transition elements changing the wavefront of the central light beams and focuses almost all the light from the IOL in that specific range [ 8 ]. The anterior surface of the IOL is designed with negative spherical aberration to compensate for the positive spherical aberration of the cornea [ 9 ].…”

Evaluation of Visual and Patient-Reported Outcomes After Implantation of Extended Depth of Focus Intraocular Lenses in Patients Not Suitable for Multifocal Lenses

“…It is available in powers from 15 to 25 D, with an intermediate addition of 1.50 D. It uses a central 2.2-mm optical zone containing 2 non-diffractive transition elements that is beam shaped (X-Wave Technology), changing the wavefront of these central light beams to elongate the depth of focus. The anterior surface of the IOL is also designed with negative spherical aberration to compensate for the positive spherical aberration of the cornea [27].…”