PURPOSE To assess the effect of intraocular lens (IOL) orientation (vertical versus horizontal) and haptic design (1-piece versus 3-piece) on centration and tilt using a Purkinje meter. SETTING Moorfields Eye Hospital NHS Foundation Trust, London, United Kingdom. DESIGN Randomized pilot study with intrapatient comparison. METHODS In part 1 of this study, patients received plate-haptic IOL...

Lens tilt and decentration relative to the corneal axis are two of the factors which cause aberration in human eyes. Although many techniques have been developed to quantitatively measure these factors, however, they are mostly confined in 2D observations. To extend the view from 2D to 3D, MR imaging technique becomes a good candidate due to its capability of 3D-image reconstruction and with fa...

Purpose: To determine the outcomes of implantation of a modified Capsular Tension Ring (CTR) and a Posterior Chamber Intraocular Lens (PCIOL) in patients with subluxated lens secondary to Marfan Syndrome (MFS). Materials and methods: A total of 21 eyes of 12 patients with subluxated lens secondary to MFS undergoing Posterior Chamber Intraocular Lens (PCIOL) from March 2004 to February 2005 were...

PURPOSE To evaluate higher-order aberrations (HOAs) after implantation of Artiflex phakic intraocular lenses (pIOLs). SETTING Department of Ophthalmology, Academic Hospital Maastricht, Maastricht, The Netherlands. METHODS This retrospective comparative case series comprised 27 eyes (14 patients) that had Artiflex pIOL implantation and 22 eyes (13 patients) that had Artisan pIOL implantation...

Purpose. To design an intraocular telescopic system (ITS) for magnifying retinal image and to simulate its optical and visual performance after implantation in a human eye model. Methods. Design and simulation were carried out with a ray-tracing and optical design software. Two different ITS were designed, and their visual performance was simulated using the Liou-Brennan eye model. The differen...

PURPOSE To review published studies reporting the posterior chamber intraocular lens tilt and decentration after surgically uneventful implantation. Potential influences of normally occurring misalignment of modern designs of IOL on the optical performances are discussed. MATERIALS AND METHODS Published theoretical and clinical studies in relation to primarily implanted posterior chamber intr...

One of the most common cause decrease vision in a pseudophakic patient is formation posterior capsular opacification (PCO) which affected by several factors like design implanted intraocular lens (IOL) and material IOL. PCO incidence has been reported to be 20.7% at 2 years & 28.5% 5 years. Decrease because necessitates capsulotomy with neodymium yttrium aluminum garnet (Nd-YAG) laser create sm...

Background. To evaluate the clinical efficacy of suture fixation of foldable intraocular lens (IOL) in ciliary sulcus guided by ultrasound biomicroscopy (UBM). Methods. Thirty-five eyes of 32 cases needing suture fixation of foldable IOL in ciliary sulcus in our hospital were collected and divided into two groups: group A and group B. In group A, UBM was performed on 19 eyes of 17 cases before ...

BACKGROUND To compare the in-the-bag stability and visual function of single-piece intraocular lenses (IOLs) and three-piece IOLs. METHODS A total of 65 patients with age-related cataracts (80 eyes) were enrolled and randomly assigned to receive in-the-bag implantation of either a single-piece IOL (40 eyes) or a three-piece IOL (40 eyes). Follow-up visits were conducted at 1 week, 1 month and...

OBJECTIVE To calculate clinical guidelines for the optimal location and size of a rotational autokeratoplasty. METHODS The ideal graft size and trephine decentration for a rotational autograft were calculated based on scar location using geometric models. Mathematical variables were set to maximize postoperative visual acuity and for generalization of the geometric model. This model was used ...