Effect on visual acuity of increased surface light scattering in intraocular lenses

Abstract

Surface light scattering with the implanted foldable hydrophobic acrylic IOL continuously increased during the postoperative years and was a risk for decreased visual acuity.

Five-year postoperative outcomes of apodized diffractive multifocal intraocular lens implantation

“…Surface light scattering with the AcrySof monofocal IOL continuously increased throughout the postoperative period; however, it did not have a substantial impact on the visual acuity [8]. Increased light scattering with monofocal VA Visual acuity, logMar logarithm of the minimum angle of resolution (logMAR) Fig.…”

“…Our results support the notion that increased surface light scattering does not adversely affect the visual acuity in patients with multifocal IOLs. Since light scattering increases over time [8], evaluation over a longer term is necessary. The current study had limitations.…”

“…Another study limitation was the follow-up period. Lundqvist et al [14] reported that the PCO increased up to 6 years postoperatively, and Miyata et al [8] found that the surface light scattering increased up to 15 years. The effect of PCO and surface light scattering on visual function increases in the longer term and was not observed in the shorter term of our study.…”

“…In one study on patients with a diffractive multifocal IOL, the bifocality that provides both UDVA and UNVA was maintained for 3 years postoperatively [6]. However, with multifocal IOLs stability over the longer term is more important since the outcome is more affected by postoperative degradation, such as development of posterior capsule opacification (PCO) and surface light scattering [7][8][9]. The development of mild PCO is not critical for corrected distance visual acuity (CDVA) with monofocal IOL, whereas the near visual acuity with multifocal IOLs is more sensitive with the development of PCO [10][11][12][13].…”

“…The development of mild PCO is not critical for corrected distance visual acuity (CDVA) with monofocal IOL, whereas the near visual acuity with multifocal IOLs is more sensitive with the development of PCO [10][11][12][13]. Lundqvist et al [14] reported that the cumulative incidence of neodynium:YAG (Nd:YAG) laser capsulotomy due to PCO in the Acrysof monofocal IOL (MA60BM; Alcon Laboratories, Fort Worth, TX) increased markedly between 2.5 and 6 years postoperatively in patients aged \65 years; however with the AcrySof IOL, increased surface light scattering is another concern [8,9]. Although a substantial impact on the CDVA has not been reported with monofocal IOLs, a case with decreased contrast sensitivity has been addressed [7].…”