Search results for "Ocular"

Response to Letter to the Editor: Outcome of Bleb Revision With Autologous Conjunctival Graft Alone or Combined With Donor Scleral Graft for Late-ons…

2021

Brain event-related potentials (ERPs) measured at birth predict later language development in children with and without familial risk for dyslexia.

2005

We report associations between brain event-related potentials (ERPs) measured from newborns with and without familial risk for dyslexia and these same children's later language and verbal memory skills at 2.5, 3.5, and 5 years of age. ERPs to synthetic consonant-vowel syllables (/ba/, /da/, /ga/; presented equiprobably with 3,910-7,285 msec interstimulus intervals) were recorded from 26 newborns at risk for familial dyslexia and 23 control infants participating in the Jyvaskyla Longitudinal Study of Dyslexia. The correlation and regression analyses showed that the at-risk type of response pattern at birth (a slower shift in polarity from positivity to negativity in responses to /ga/ at 540-…

Optical quality of intraocular lenses after several years in the human eye

2013

The optical quality of explanted intraocular lenses (IOLs) was analysed to verify if their quality is maintained after having been in the human eye for several years. Twenty-five explanted IOLs were studied, 10 because of intraocular luxation and 15 from corneal donors. The dioptric power and modulation transfer function (MTF) were determined to discover the image quality of the IOLs. The spectral transmission was also established to ascertain whether the filter against ultraviolet (UV) radiation was still effective. The results show that the MTF of implanted IOLs is maintained and therefore so is the image quality they provide. Only decay in the MTF of some of the explanted IOLs was observ…

Contribution of area 19 to the foreground-background-interaction of the cat: an analysis based on single cell recordings and behavioural experiments.

1990

The contribution of area 19 to pattern discrimination in the cat was studied by single cell recordings in this area and by behavioural experiments before and after bilateral lesions. In order to make quantitative comparisons between behavioural performance and that of cell systems, we introduced a new parameter that characterizes visual neurons by their signal-to-noise (S/N) thresholds. A structured visual background made up of Gaussian visual broadband noise which could be moved was superimposed on the signal (moving bars or outline patterns) and the S/N characteristics of the response were determined by varying the signal intensity. The detection performance of cats after bilateral lesion…

European vestibular experiments on the Spacelab-1 mission: 7. Ocular counterrolling measurements pre- and post-flight.

1986

The static ocular counterrolling (OCR) of the four scientific crew members in the first Spacelab mission was measured during baseline-data-collection before and after the flight of SL-1. It was presumed that the modification of otolithic responses during spaceflight will be reflected in specific changes of the OCR-gain on the first days after recovery. The magnitude of OCR was determined analysing colour-transparencies of subjects right eyes that were produced in different positions of lateral body tilt. In general, one subject did not show any changes at all; three subjects exhibited a significant decrease of OCR-gain after exposure to weightlessness, whereby differences could be found bet…

Study and modulation of human cortical excitability with transcranial magnetic stimulation.

1998

Transcranial magnetic stimulation (TMS) can be applied in different paradigms to obtain a measure of various aspects of cortical excitability. These different TMS paradigms provide information about different neurotransmitter systems, enhance our understanding about the pathophysiology of neuropsychiatric conditions, and in the future may be helpful as a guide for pharmacological interventions. In addition, repetitive TMS (rTMS) modulates cortical excitability beyond the duration of the rTMS trains themselves. Depending on rTMS parameters, a lasting inhibition or facilitation of cortical excitability can be induced. These effects can be demonstrated neurophysiologically or by combining rTMS…

EHMTI-0220. Cortical excitability in episodic cluster headache.

2014

Methods Twenty-five patients with episodic CH and thirteen healthy subjects underwent an experimental session where we evaluated, in both hemispheres, motor-cortical response to: 1) single-pulse TMS: i.e. motor threshold (MT); input-output (IO) curves and cortical silent period (CSP) and 2) paired-pulse TMS: i.e. intracortical facilitation (ICF) and short intracortical inhibition (SICI). Thirteen patients were evaluated outside bout, while the remaining twelve patients were inside bout at the time of recording.

Spontaneous Nocturnal Erections - Physiology and Clinical Applications. Spontane nachtliche Erektionen - Physiologie und klinische Anwendungen

2005

Spontaneous nocturnal erections in men are a well-known phenomenon whose physiology however is not yet really understood. The measurement of nocturnal erections has gained clinical relevance for the diagnosis of erectile dysfunction because it allows an objective and quantitative assessment of the erectile capacity. A decisive advantage compared to other diagnostic tests carried out during wakefulness is the exclusion of psychological factors to a great extent. Thus, an evaluation of the organic component of an erectile dysfunction is possible. Regarding the interpretation of nocturnal erection records, various factors possibly influencing the results must be considered; this is particularl…

Changes in ocular signs and symptoms when switching from preserved latanoprost 0.005% to preservative-free tafluprost 0.0015%: phase IIIb study in pa…

2008

Purpose This open-label, multinational, phase IIIb study investigated the changes in ocular signs and symptoms when patients were switched from preserved latanoprost 0.005% to preservative-free tafluprost 0.0015% (q.d. at 20:00) for 12 weeks. Methods Patients with open-angle glaucoma or ocular hypertension who had received latanoprost for at least 6 months and had at least 2 ocular symptoms or one symptom and one sign were enrolled (n=158). Change from screening in ocular symptoms and signs were the main endpoints. Data from the 6-week analysis are reported here. Results After switching to preservative-free tafluprost, the proportion of patients with at least mild symptoms decreased: irrita…

<p>Alteration in binocular fusion modifies audiovisual integration in children</p>

2019

Background: In the field of multisensory integration, vision is generally thought to dominate audiovisual interactions, at least in spatial tasks, but the role of binocular fusion in audiovisual integration has not yet been studied. Methods: Using the Maddox test, a classical ophthalmological test used to subjectively detect a latent unilateral eye deviation, we checked whether an alteration in binocular vision in young patients would be able to change audiovisual integration. The study was performed on a group of ten children (five males and five females aged 11.3±1.6 years) with normal binocular vision, and revealed a visual phenomenon consisting of stochastic disappearanceof part of a vi…