Assessing the in vitro optical quality of presbyopic solutions based on the axial modulation transfer function

Abstract

None of the authors has a financial or proprietary interest in any material or method mentioned.

Optimal orientation for angularly segmented multifocal corrections

“…Removing the characteristic dip in bifocal image quality at intermediate distances (successfully removed by the trifocal and four‐foci designs) comes with two costs: a small reduction in the effective add power, and a reduction of a 36% of the peak optical performance for both, far and near distances. Previous literature shows similar results for multifocal designs with radial divisions …”

“…Previous literature shows similar results for multifocal designs with radial divisions. 25,26 Variability of the distribution of HOAs between subjects produced a different optical performance for the same designs for different orientations. The area under the curve increased on average between the worst orientation and the best orientation by 8.3% for bifocal designs, by 5.8% for trifocal designs, and by 5.5% for designs with 4-foci.…”

Assessment of straylight and the modulation transfer function of intraocular lenses with centrally localized opacification associated with the intraocular injection of gas

“…7,11 The optical performance of opacified lenses has been studied by means of light scattering (straylight) measurements, [21][22][23] and quality metrics derived from the point spread function, such as the modulation transfer function (MTF) and the Strehl ration (SR). [24][25][26][27] Studies on straylight from different types of IOL opacification such as calcification, snow-flake degeneration, and glistenings, have shown that straylight is a very sensitive measure to detect the presence of IOL pathology. 20,28,29 Deterioration of the optical quality in those lenses in terms of the MTF, occurs only if opacification is severe.…”

Trifocal versus Bifocal Diffractive Intraocular Lens Implantation after Cataract Surgery or Refractive Lens Exchange: a Meta-analysis

“… 6 However, experimental studies have reported that bifocal diffractive IOL shows better modulation transfer function than trifocal diffractive IOL at far focal points, but shows varying results at near and intermediate focal points. 7 8 9 Clinical studies also showed inconsistent results in distance, intermediate, and near VAs. 10 11 12 13 Furthermore, the most of the clinical studies were limited by the small sample size.…”