Search results for "Detachment"

Vascular changes after vitrectomy for rhegmatogenous retinal detachment: optical coherence tomography angiography study

2020

Purpose: To analyse the postoperative foveal avascular zone (FAZ) area, superficial vessel density (SVD) and deep vessel density (DVD) and their correlation with functional (best-corrected visual acuity, BCVA) and anatomical outcomes (foveal macular thickness, FMT) after surgery for rhegmatogenous retinal detachment (RRD) repair. Method: Patients with RRD eyes, successfully treated with a single pars plana vitrectomy (PPV) with gas tamponade and a minimum 12 months follow-up, were re-examined. Foveal avascular zone (FAZ) area, SVD, DVD and FMT were evaluated by using optical coherence tomography angiography (OCTA) and compared to fellow eye. Results: Fifty-six patients with macula-on and 37…

Retinal detachment with spontaneous dialysis of the ora serrata in a 13-year-old child with neurofibromatosis type 1: a case report.

2020

A 13‑year‑old child diagnosed with neurofibromatosis type 1 who on a routine control presented with rhegmatogenous retinal detachment associated to dialysis of the ora serrata in the left eye (OS). There were no clinical signs or history of contuse ocular trauma. Neurofibromatosis produces alterations in fibroblasts of the cortex of the vitreous base. This results in deficient production of the collagen fibers that anchor the vitreous base to the pars plana and the peripheral neurosensory retina. Thus, suboptimal function of the fibroblasts explains spontaneous avulsion of the vitreous base. Such avulsion in turn is related to dialysis of the ora serrata.

Retinopathy of prematurity-current diagnosis and management

1993

Despite advances in ophthalmological care of premature infants, retinopathy of prematurity (ROP) remains a still unsolved problem for paediatricians as well as ophthalmologists. A survey of the current literature concerning drug therapy and surgical management as related to the different stages of ROP is given. The classification system for ROP according to the International Committee is presented as well as our screening policy in relation to the literature. The effectiveness in preventing severe cases of ROP and the toxicity of vitamin E supplementation in high-risk premature infants is still disputed and no recommendations can be given. Cryotherapy is recommended in symmetric cases of st…

Probing Rydberg atoms through collisions with helium in the presence of static electric and magnetic fields

2005

We report on field induced inelasticity effects in state-to-state transitions caused by collisions of helium with Rydberg atoms in the presence of parallel static electric and magnetic fields. Due to the phases accumulated by the wavefunctions of the states involved into the collision events, the transition cross sections plotted as a function of the external fields exhibit modulations. When the relative velocity of the colliding atoms is high enough, these modulations are wiped out, while sizable modifications of the cross sections may take place due to the alteration of the wavefunctions' spatial localization. The possibility of using the field-assisted collisions as a probe giving inform…

Long-term patterns of effort-reward imbalance and over-commitment: Investigating occupational well-being and recovery experiences as outcomes

2013

The aim of this study was, first, to identify long-term patterns of effort-reward imbalance (ERI) and over-commitment (OVC), and, second, to examine how occupational well-being (burnout, work engagement) and recovery experiences (psychological detachment, relaxation, mastery and control) differ in these patterns. The study was based on follow-up data with three measurement points (2006, 2008, 2010) collected from Finnish managers (N=298). Latent Profile Analysis resulted in five long-term ERI-OVC patterns: a high-risk pattern (high ERI, high OVC), found in 20% of the participants; a low-risk pattern (low ERI, low OVC), found in 24% of participants; a relatively low-risk pattern (low ERI, mo…

The extensional Messaria shear zone and associated brittle detachment faults, Aegean Sea, Greece

2005

Structural, thermochronological and metamorphic data are used to elucidate the tectonic nature and evolution of the ductile extensional Messaria shear zone and the associated brittle Messaria and Fanari detachment faults, which exhumed their footwall from mid-crustal depths on the island of Ikaria in the Aegean. Thermobarometric data indicate that the Messaria shear zone formed at 350–>400 °C and 3–4 kbar (i.e. at a depth of c . 15 km). Normal faulting was accompanied by the intrusion of two granites, which together with the thermobarometric data indicate a relatively high thermal field gradient of 25–35 °C km −1 . Zircon and apatite fission-track and apatite (U–Th)/He ages demonstrate rapi…

Emotional separation and detachment as two distinct dimensions of parent--adolescent relationships

2011

The study examined adolescents’ emotional separation and detachment from parents, analyzing their relations with connectedness and agency, with some aspects of self—other boundary regulation and with problem behavior. The participants were 331 Italian adolescents, aged from 16 to 19 years (mean age = 17.40, SD = 1.14). Separation and detachment were positively related; they were negatively related to connectedness; detachment was also negatively associated to agency. Emotional separation was negatively predicted by empathic concern, perspective-taking and separate self; emotional detachment was negatively predicted by empathic concern and self—other differentiation. Separation negatively p…

Testing the direct and moderator effects of the stressor-detachment model over one year : A latent change perspective

2018

ABSTRACTTo test the direct and moderator effects of the stressor–detachment model from a long-term perspective, we investigated whether workload and detachment are related to changes in exhaustion and sleep difficulties over one year. We also examined whether detachment attenuates the relationship between high workload and these outcomes both cross-sectionally and over time. Questionnaire data with 1722 respondents at Time 1 and 1182 respondents at Time 2 were collected. We used a latent change score approach to analyse the data in order to identify intra-individual change among the studied constructs. Our results showed that high workload and low detachment at baseline were related to an i…

Entfernung von subfovealem Perfluorcarbon durch ein therapeutisches Makulaforamen

2018

Evaluation of different mechanical fruit harvesting systems and oil quality in very large size olive trees

2014

In 2006 and 2009, trials were carried out in the Apulia region in Southern Italy to evalu-ate the possibility of mechanizing olive harvesting in groves of old and very large trees. The trees belonged to the cultivars ‘Cellina di Nardò’ and ‘Ogliarola Salentina’. They were 60-100 years old and 7-9 m tall with a canopy volume of 140-360 m3. In the first half of November 2006, with a mechanical beater mounted on a tractor plus hand-held pneumatic combs, the harvesting yield was close to 90% of the total olives present in the canopy, and the harvesting working productivity was around 60 kg of harvested olives h-1 worker-1. With a self-propelled shaker attached to the main branches the harvestin…