Visual quality after presbyopia surgery

Resumen

PURPOSE: To demonstrate the optical quality of several intraocular lenses using a double-pass system. SETTING: Quirón Universitary Hospital of Madrid, Spain. METHODS: The optical quality using this system was measured in several groups of patients implanted with different intraocular lenses: Tecnis ZM900, Acri.Lisa 366D, ReSTOR SN6AD1 and Crystalens® HD. The sample for the statistical analysis comprised 20 eyes per group. In all the groups the Point Spread Function (PSF), Modulation Transfer Function (MTF) and Oqas™ Scattering Index (OSI) were measured both before and 3 months post-surgery. RESULTS: The mean PSF values for each sample were as follows: Tecnis™ group ZM900 was 4.41±1.15. For the Acri.LISA 366D group, the values were 3.90±1.45. For the Crystalens® HD group, of 3.47±0.98 and for the ReSTOR® SNAD1 group of 3.87±1.41. The mean values for MTF for all the groups were as follows: for the Tecnis™ ZM900 group, 31.22±8.27. For the Acri.LISA 366D grorystalens® HD group, of 3.47±0.98 and for the ReSTOR® SNAD1 group of 3.87±1.41. The mean values for MTF for all the groups were as follows: for the Tecnis™ ZM900 group, 31.22±8.27. For the Acri.LISA 366D group, 36.81±9.56. For the for all the groups were as follows: for the Tecnis™ ZM900 group, 31.22±8.27. For the Acri.LISA 366D group, 36.81±9.56. For the Crystalens® HD group, 32.27±6.41 and for the ReSTOR® SNAD1 group, 29.62±13.41. The mean values for OSI intraocular diffusion were as follows: for the Tecnis™ ZM900 group, 2.00±0.74. For the Acri.LISA 366D group,1.83±0.91. For the Crystalens® HD group, 1.42±0.58 and for the ReSTOR® SNAD1 group 1.97±1.02. No statistically significant differences were found between the groups in none of the studied variables. CONCLUSIONS: Disseminated light and loss of contrast sensitivity could compromise the visual quality of pseudophakic patients with this type of implants vis-à-vis monofocal implants.