Старонка 1 ад 30 вынікі
OBJECTIVE
The fitting of toric soft contact lenses is often complicated by interference between the toric optics and the geometry need to stabilise the lens on the eye. The use of a spherical trial lens to determine the parameters of a toric soft contact lens can lead to unintended positioning and
UNASSIGNED
To report a case of a patient with unilateral Adie's pupil who underwent bilateral cataract extraction with multifocal and monofocal posterior chamber intraocular lens (IOL) implantation.
UNASSIGNED
A 74-year-old woman presented to our institution complaining of worsening near vision.
In this study the contribution of osmotic changes to disintegrative globulization of lens cortical fibers was examined. Single fiber cells were isolated by trypsinization of adult rat lens cortex, and morphological changes elicited by exposure to different external solutions were monitored
A 14-year-old girl presented with bilateral keratoconus (KC). Maximum keratometry (Kmax) was 63.9 diopter (D) in the right eye and 63.7 D in the left eye. Minimum corneal thickness was 371 μm in the right eye and 370 μm in the left. The right eye underwent epithelium-off accelerated corneal
Ocular accommodation adopts a mean baseline response level of approximately 1.0 D in the absence of blur feedback (open-loop state). This baseline or tonic accommodation (TA) can be elevated following a sustained monocular accommodative response to a dioptric stimulus (lens adaptation) that exceeds
OBJECTIVE
An association between tonic accommodation, the resting accommodative position of the eye in the absence of a visually compelling stimulus, and refractive error has been reported in adults and children. In general, myopes have the lowest (or least myopic) levels of tonic accommodation. The
Beta-adrenoceptor (β-AR) exerts critical regulation of cardiac function. MicroRNAs (miRNAs) are potentially involved in a variety of biological and pathological processes. This study aimed to investigate the role of miRNA let-7e in the up-regulation of β(1) -AR and arrhythmogenesis in acute
A 22-year-old white man presented with photopsia of 3-year duration despite a corrected distance visual acuity of 20/20 in both eyes. Ophthalmic examination revealed multiple irregularly shaped white cortical opacifications of the lens in both eyes but no other significant ocular findings. One year
Disturbances of binocular vision are described clinically by the Duane-White classification in terms of the magnitude of the accommodative-convergence ratio (AC/A). Convergence excess and convergence insufficiency are assumed to result from high and low AC/A ratios respectively. It is assumed that
Several theoretical control models depict the adaptation effects observed in the accommodation and vergence mechanisms of the human visual system. Two current quantitative models differ in their approach of defining adaptation and in identifying the effect of controller adaptation on their
The concept of the conventional aqueous outflow pathway (through the trabecular meshwork and other components of the canal's inner wall, along Schlemm's canal to collector channels, and out of the eye through the collector channels) was modeled on tubes with leaky walls and a network of electrical
A man became ill with insufficiency of parathyroid glands 10 years after strumectomy. Numerous brain organic changes were apparent (severe epileptic seizures, tonic seizures of the brain stem, pathological EEG, PEG and liquor symptoms, papilledema, marked mental disturbances ranging in severity up
A dynamic model of ocular accommodation is used to simulate the stability and dynamic performance of accommodating intraocular lenses (A-IOLs) that replace the hardened natural ocular lens that is unable to change focus. Accommodation simulations of an older eye with A-IOL materials having
We have developed a dynamic model of accommodation that combines independent phasic-velocity and tonic-position neural signals to control position, velocity and acceleration properties of accommodative step responses. Phasic and tonic signals were obtained from neural integration of a fixed-height
The longitudinal chromatic aberration (LCA) of the human eye was determined between wavelengths 458 and 633 nm for ten observers by incorporating Argon and Helium-Neon Lasers into a Badal optometer system such that tonic (or "dark focus") resting positions of accommodation could be measured under