Purpose: To screen patients with a monofocal intraocular lens (IOL) for incidence of unaided 20/40 and 0.3 LogMAR for distance and near (pseudoaccommodation) and to find factors for pseudoaccommodation.
Settings: University Hospitals Sussex NHS Foundation Trust, Brighton, United Kingdom.
This study aimed to assess the anterior corneal wavefront aberrations, keratometry, astigmatism vectors and pupil size between Pentacam HR® (Oculus Optikgeraete GmbH, Wetzlar, Germany) and iTrace® (Tracey Technologies Corp., Houston, TX, USA). In this observational study, 100 eyes (50 healthy volunteers) were scanned in mesopic light condition with a Pentacam HR® and iTrace®.
View Article and Find Full Text PDFPurpose: To compare slit lamp mounted anterior segment cameras (SLCs) versus digital compact camera (DCC) with slit-lamp adaptor when used by an inexperienced technician.
Methods: In this cross sectional study, where posterior capsule opacification (PCO) was used as a comparator, patients were consented for one photograph with SLC and two with DCC (DCC1 and DCC2), with a slit lamp adaptor. An inexperienced clinic technician, who took all the photographs and masked the images, recruited one eye of each patient.
Secondary visual loss occurs in millions of patients due to a wound-healing response, known as posterior capsule opacification (PCO), following cataract surgery. An intraocular lens (IOL) is implanted into residual lens tissue, known as the capsular bag, following cataract removal. Standard IOLs allow the anterior and posterior capsules to become physically connected.
View Article and Find Full Text PDFPurpose: During cataract surgery an IOL is placed within the capsular bag. Clinical studies show that IOLs with a square edge profile and complete contact between the IOL and the anterior capsule (AC) are currently the best way to prevent posterior capsule opacification (PCO). This has been challenged by recent clinical and experimental observations, which suggest that if the capsular bag is kept open with separation of contact between the AC and posterior capsule (PC) by an "open-bag device" PCO is dramatically reduced.
View Article and Find Full Text PDFPurpose: To evaluate the effect of complete destruction of lens epithelial cells (LECs) in the capsular bag on intraocular lens (IOL) stability.
Setting: School of Biological Sciences, University of East Anglia, Norwich, United Kingdom.
Design: Comparative evaluation.
Purpose: To compare visual acuity, intraocular lens (IOL) movement, and depth of focus with the Crystalens HD single-optic accommodating IOL and the Tecnis ZCB00 aspheric monofocal IOL.
Setting: St. Thomas' Hospital, London, United Kingdom.
Purpose: To compare posterior capsule opacification (PCO) between 2 microincision hydrophilic intraocular lenses (IOLs) and with a conventional spherical hydrophobic IOL.
Setting: St. Thomas' Hospital, London, United Kingdom.
Purpose: To report an orbital cyst underlying a chorioretinal coloboma in an otherwise normal eye, detected by spectral domain optical coherence tomography imaging. To the authors' knowledge, this is the first case of a chorioretinal colobomatous cyst in the normal eye to be reported.
Methods: A descriptive case report of a patient with a chorioretinal coloboma with an underlying orbital cyst.
Purpose: To evaluate visual performance and aberrations with aspheric and spherically neutral microincision intraocular lenses (IOLs) and assess the influence of asphericity on visual performance, wavefront aberration, and depth of focus.
Setting: St. Thomas' Hospital, London, United Kingdom.
Purpose: To report a distinct type of calcification in hydrophilic intraocular lenses in complicated, traumatized eyes with a history of intraocular gas use.
Design: Observational case series.
Methods: Three cases of hydrophilic intraocular lens (IOL) opacification confined to the pupillary area are reported from clinical practice in London, UK.
Purpose: To evaluate intra-individual differences in posterior capsule opacification (PCO) and visual performance between spherical AcrySof SN60AT and an aspheric AcrySof SN60WF intraocular lens (IOL) with a posterior aspheric surface, both of which are made of same hydrophobic acrylic material.
Setting: Ophthalmology Department, St Thomas' Hospital, London, UK.
Methods: In this prospective randomized, fellow-eye comparison, an aspheric IOL, which is 9% thinner in comparison with the spherical IOL, was randomized to the first eye of 47 patients and fellow-eye surgery was performed within 3 weeks.
Purpose: To analyze the effect of hydrophobic and hydrophilic acrylic intraocular lens (IOL) material on the optical quality in pseudophakic eyes with a clear posterior capsule and assess in vitro forward light scatter of these IOLs.
Setting: St. Thomas' Hospital, London, United Kingdom.
Modern cataract surgery is safe in more than 95 per cent of patients. In the small number of cases where a serious complication occurs, the most common is an intra-operative posterior capsular rupture. This can lead to vitreous loss or a dropped nucleus and can increase the risk of post-operative cystoid macular oedema or retinal detachment.
View Article and Find Full Text PDFPurpose: To compare the accommodative performance of the Morcher BioComFold Type 89A bag-in-the-lens intraocular lens (IOL) with a conventional in-the-bag control IOL in presbyopic eyes.
Design: Prospective, randomized clinical trial with intraindividual comparison.
Setting: Department of Ophthalmology, St.
Purpose: to assess whether the double-pass technique can be employed to quantify the amount of light scattering in patients with uveitis.
Methods: 56 eyes of 44 patients with intraocular inflammation were consecutively recruited from the uveitis clinic over 9 months. The degree of intraocular inflammation was recorded according to the Standardization of Uveitis Nomenclature criteria and the eyes were grouped as having anterior, intermediate, posterior or panuveitis.
J Cataract Refract Surg
August 2010
Unlabelled: A modified dissection technique of donor eyes for investigating posterior capsule opacification (PCO) that preserves normal capsule and zonule architecture is described. The intact crystalline lens-zonule-ciliary body complex is dissected from the globe in one piece and pinned with 8 entomological pins through the ciliary body to a soft silicone ring with an internal diameter of 12.7 mm.
View Article and Find Full Text PDFJ Cataract Refract Surg
July 2010
Purpose: To evaluate the natural history of focal collections (islands) of lens epithelial cells (LECs) on the posterior capsule after cataract surgery.
Setting: Department of Ophthalmology, St. Thomas' Hospital, London, United Kingdom.
Purpose: To determine agreement between partial coherence interferometry (PCI) and anterior segment optical coherence tomography (AS-OCT) measurements of anterior chamber depth (ACD) and axial intraocular lens (IOL) movement in eyes with an accommodating IOL.
Setting: Department of Ophthalmology, St. Thomas' Hospital, London, United Kingdom.
Purpose: To determine the visual and accommodative performance of the OPAL-A focus-shift accommodating intraocular lens (IOL).
Setting: Department of Ophthalmology, St. Thomas' Hospital, London, United Kingdom.