Study sample Power calculations to determine the sample size were performed (apparently in the preliminary phase of the study). These suggested that a sample of 99 patients in each group was required to detect a 0.4 difference in mean scores between the two groups with 80% power and at a 5% level of significance. All of the patients who underwent bilateral implantation of the multifocal IOL wer...

PURPOSE To compare visual outcome and manual handling of additional multifocal sulcus-fixated intraocular lenses (IOLs) of different materials and lens concepts. METHODS Visual outcomes after implantation of a monofocal IOL in the capsular bag followed by implantation of a sulcus-fixated multifocal IOL (MIOL) in patients with cataract were assessed. Patients were randomly assigned to receive ...

Study sample Power calculations to determine the sample size were performed (apparently in the preliminary phase of the study). These suggested that a sample of 99 patients in each group was required to detect a 0.4 difference in mean scores between the two groups with 80% power and at a 5% level of significance. All of the patients who underwent bilateral implantation of the multifocal IOL wer...

PURPOSE To report non-organic visual loss (NOVL) following cataract surgery with multifocal intraocular lens (IOL) implantation. METHODS After reviewing consecutive cases of NOVL diagnosed by a single neuro-ophthalmologist over a one year period, two patients reported herein attributed their visual symptoms to cataract surgery and multifocal IOL implantation. RESULTS In both patients variab...

A diffractive grating is promising for color separation to effectively replace conventional absorptive dye color filter in liquid crystal displays. In this paper, we demonstrated a color separation module consisting of an aspheric-lenticular lens array and a blazed grating to substitute for the dye color filter. Each component was designed to match the recent fabrication ability of our roll-to-...

In the current era of presbyopia-correcting intraocular lenses (IOLs), toric IOLs and aspheric IOL technology, the practice milieu is changing. Informed consent takes on newmeaning when the surgeon and the patient decide together which IOL technology represents the best fit for a particular life style and its visual demands. Customizing IOL choice is no longer optional; it is essential to the p...

The third-order aberrations of a diffractive optical element with paraxial zone spacings are derived as a function of aperture stop position. It is shown that by placing the stop in the front focal plane, coma and astigmatism are identically zero, assuming an infinitely distant object. In addition, since the element is diffractive, the Petzval sum is also zero. Modulation transfer function comp...

BACKGROUND Improvement in surgical devices and intraocular lenses has made modern cataract surgery a safe procedure with decreasing complication rates. Intraocular lens dislocation is a serious complication after cataract surgery. Although most dislocations occur during the first week postoperative period, late intraocular lens dislocation occurring 3 months or later post-surgery has been repor...

PURPOSE To describe the use of argon laser iridoplasty following implantation of a multifocal intraocular lens (IOL) to improve visual function. METHODS Argon laser spots of 500-mW power, 500-μm spot diameter, and 500-ms duration were placed in the midperipheral iris in the area in which the iris was encroaching on the IOL. RESULTS Argon laser iridoplasty provided statistically significant ...