Results 71 to 80 of about 61,783 (227)
Fine guidance for a spaceborne telescope [PDF]
, 1974 Two transparent plates are mounted at equal and opposite angles in secondary optical-system housing, angles being set for optimum astigmatism correction.
Amon, M., Rosin, S.
core +1 more source
Acta Ophthalmologica, EarlyView.Abstract Purpose To investigate changes in choroidal and retinal thickness before and during myopia control treatment with orthokeratology lenses (OKL) in myopic children. Methods This was a sub‐study of CONTROL and CONTROL2 studies. The present study was a 2‐year, prospective, single‐group interventional study consisting of a 6‐month pre‐treatment ...
P. O. Hansen, F. Møller, T. M. Jakobsen
wiley +1 more source
Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft, 2019 Astigmatism is the most frequent refractive error worldwide followed by hyperopia and myopia. Internal astigmatism has to be differentiated from external astigmatism. Furthermore, external astigmatism can be divided into "with the rule", "against the rule" and "oblique".
N, Woltsche +4 more
openaire +4 more sources
Astigmatism in candidates of Cataract surgery and its relationship with corneal optical power, axial length, sex and patient age [PDF]
Acta Medica Iranica, 2000 This study was conducted to define the prevalence and types of corneal astigmatism in relation with corneal optical power, axial length, sex and patient age. 641 cataract patients were included in a descriptive study.
Siatiri H
doaj
Polar Value Analysis of Low to Moderate Astigmatism with Wavefront-Guided Sub-Bowman Keratomileusis
Journal of Ophthalmology, 2017 Purpose. To evaluate the astigmatic outcomes of wavefront-guided sub-Bowman keratomileusis (WFG-SBK) for low to moderate myopic astigmatism. Methods. This study enrolled 100 right eyes from 100 patients who underwent WFG-SBK for the correction of myopia ...
Pisong Yan, Zhiyu Du, Yu Zhang
doaj +1 more source
Repeatability of keratometry depending on tear film osmolarity
Acta Ophthalmologica, EarlyView.Abstract Purpose To determine the repeatability of keratometry and astigmatism measurements of patients depending on the tear film osmolarity using three different devices. Methods In this study, 97 eyes of 97 patients with a mean age of 64.92 ± 12.07 years received three repeated measurements with the IOLMaster 700 (Carl Zeiss Meditec, Jena, Germany),
David Schneider +4 more
wiley +1 more source
The impacts of high refractive errors on self‐reported visual function and visual concern
Acta Ophthalmologica, EarlyView.Abstract Purpose To examine the association between refractive errors and self‐reported visual function and visual concern, considering self‐perceived present eyesight, concerns about vision, accomplishing less and limitations in daily activities in an eye‐healthy cohort.
Jens Riis Møller +9 more
wiley +1 more source
Delhi Journal of Ophthalmology, 2016 Aim: To evaluate the role of clear corneal incision combined with opposite clear corneal incision in controlling astigmatism in patients undergoing phacoemulsification surgery for cataract. Design: Prospective clinical study.
J. S. Bhalla +2 more
doaj +1 more source
An Infrared Camera for Leuschner Observatory and the Berkeley Undergraduate Astronomy Lab
, 2001 We describe the design, fabrication, and operation of an infrared camera which is in use at the 30-inch telescope of the Leuschner Observatory. The camera is based on a Rockwell PICNIC 256 x 256 pixel HgCdTe array, which is sensitive from 0.9-2.5 micron.
James R. Graham +3 more
core +1 more source
Acta Ophthalmologica, EarlyView.Abstract Purpose To evaluate patient‐reported outcome measures (PROMs) and visual function across four groups of public cataract patients: emmetropia, mini‐monovision, monovision with partial‐range of field (RoF) narrow intraocular lenses (IOLs) and patients implanted with partial‐RoF extended IOLs.
Anne Guldhammer Skov +4 more
wiley +1 more source