Search results for "Eye"
showing 10 items of 2511 documents
Pretnoguruma lēcas datora lietotāju redzes noguruma mazināšanai
2022
Darbs ir uzrakstīts latviešu valodā uz 34 lapaspusēm. Tas satur 25 attēlus, 2 tabulas un 34 atsauces uz literatūras avotiem. Mērķis: izpētīt Latvijā lietojamo pretnoguruma lēcu efektivitāti acu noguruma mazināšanai. Metodes: izmantota anketēšana, lai pētītu redzes noguruma pakāpi un simptomus digitālo ierīču lietotājiem. Praktiskajā daļā pētīta Essilor Eyezen 0,6 lēcu efektivitāte darbam ar digitālām ierīcēm, kā arī veikta Essilor Eyezen 0,4, 0,6 un LTL Holiday 0,75 lēcu salīdzināšana un analīze. Rezultāti: vairāk nekā puse no aptaujātiem pavada darbā pie datora vairāk nekā sešas stundas. Tika atrasta statistiski nozīmīgas redzes noguruma pakāpes izmaiņas pirms un pēc ilgstoša darba pie dat…
Priekšējās kameras kakta novērtēšana ar optiskās koherences tomogrāfu
2020
Bakalaura darbs uzrakstīts latviešu valodā uz 25 lapaspusēm, tas satur 6 tabulas, 19 attēlus un 30 literatūras atsauces. Pētījuma mērķis bija izpētīt acs priekšējā kameras kakta struktūras atvērta un slēgta kakta glaukomas gadījumos, un sakarību starp acs priekšējā kameras kakta leņķi un varavīksnenes saknes formu. Tika analizēti 311 vienas līnijas OCT attēli no oftalmologa privātprakses, kas tika iedalīti vairākās grupās: NORM (bez acu saslimšanām), PAKG1 (primāra atvērta kakta glaukoma 1. stadijā), PAKG2 (primāra atvērta kakta glaukoma 2. stadijā), PAKG3 (primāra atvērta kakta glaukoma 3. stadijā) un SAKG (slēgta atvērta kakta glaukoma) tika analizētas varavīksnenes saknes formas (VSF) un…
Sensory Organ Investment Varies with Body Size and Sex in the Butterfly Pieris napi
2021
Simple Summary Pollinating insects rely on a range of senses such as vision, olfaction, gustation, and mechanosensation to utilise, locate, and fly between floral resources. The size of different sensory organs determines their sensitivity and provides an indication of their relative importance—larger organs can enhance sensitivity by increasing the number or size of sensing structures. However, increasing the relative size of an organ would require additional energy for developing and maintaining it. This likely leads to a trade-off between the energy invested into different sensory systems within individuals. To explore how the size of the sensory organs vary with body size in insect poll…
Project DyAdd : Nonlinguistic theories of dyslexia predict intelligence
2020
Two themes have puzzled the research on developmental and learning disorders for decades. First, some of the risk and protective factors behind developmental challenges are suggested to be shared and some to be specific for a given condition. Second, language-based learning difficulties like dyslexia are suggested to result from or correlate with also nonlinguistic aspects of information processing. In the current study, we investigated how adults with developmental dyslexia and ADHD as well as healthy controls cluster across various dimensions designed to tap the prominent nonlinguistic theories of dyslexia. Participants were 18–55-year-old adults with dyslexia (n = 36), ADHD (n = 22), and…
The relationship between skin conductance and eye contact of spouses in couple therapy
2017
Katsekontaktin ja ihon sähkönjohtavuuden välistä yhteyttä on tutkittu aiemminkin, mutta tutkimusta ei ole tehty monitoimijaisessa terapiatilanteessa. Tämän tutkimuksen tarkoituksena oli tarkastella ihon sähkönjohtavuuden ja katsekontaktin välistä yhteyttä pariterapiassa pariskunnan välisen synkronian kautta, ja lisäksi selvittää, kuinka ihon sähkönjohtavuus muuttuu katsekontaktin eri hetkinä: ennen kuin katsekontakti alkaa, sen alkamishetkellä, ja alkamishetken jälkeen. Oletuksena oli, että ihon sähkönjohtavuuden vasteet nousevat katsekontaktin alkuhetkellä. Lisäksi tarkasteltiin, onko miehillä ja naisilla eroa ihon sähkönjohtavuuden vasteissa. Tutkimuksen otos koostui 11 pariskunnasta, joi…
The effects of instructional self-talk on quiet eye duration and golf putting performance
2017
Yonatan Sarig, 2017. The Effects of Instructional Self-Talk on Quiet Eye Duration and Performance. Faculty of Sports and Health Science. University of Jyväskylä. Master’s thesis, 63p. While the literature on the effects of instructional self-talk is comprehensive, a somewhat under-investigated subject is the underlying mechanisms of instructional self-talk. As of late, the trend has been shifted towards researching what are the motivational and attentional constructs at the base of self-talk. Potentially, one such attentional construct is the quiet eye; the final gaze fixation on a target before the execution of task-oriented movement. Since the duration of the quiet eye is found to be asso…
Attēla kvalitātes ietekme uz acs struktūru izvērtēšanu foto-diagnostikā
2021
Darba mērķis bija izpētīt 18 samazinātas kvalitātes spraugas lampas attēlu, kuros attēloti acu priekšējo daļu struktūras, ietekmi uz 5 profesionāļu atzinumiem. Attēli, kas sadalīti 3 6 attēlu komplektos trim samazināšanas filtriem, izplūdums (1-6), troksnis (7-12) un kontrasts (13-18), tika parādīti datora ekrānā un salīdzināti ar oriģinālajiem attēliem. Rezultāti tika saskaņoti ar īsto attēla diagnozi un novērtēti 3 punktu sistēmā, pareizs atradums: 1 un 0,5 (daļēji) punkti, nepareizs vai nav atrasts: 0 punkti. Tika reģistrēti 53 punkti no 90 (58% pareizi un 41% nepareizi). Rezultāti liecina, ka attēla kvalitātes samazināšana būtiski neietekme…
Choroidal thickness in glaucoma patients and glaucoma suspects measured by spectral domain coherence optical tomography
2012
Purpose: The aim of our study was to evaluate and compare retro-foveolar choroidal thickness (RFCT) of healthy subjects, individuals with intraocular hypertension, patients with primary open-angle glaucoma (POAG), patients with normal tension glaucoma (NTG) and patients with primary angle-closure glaucoma (PACG) by spectral domain optical coherence tomography (SD-OCT).Methods: Sixty-five healthy eyes, 30 eyes with intraocular hypertension, 90 eyes with POAG, 30 eyes with NTG and 20 eyes with PACG were included in this cross-sectional study. RFCT, foveolar retinal thickness and average retinal nerve fiber layer thickness (RNFL) were measured by SD-OCT (Spectralis HRA-OCT, Heidelberg Engineer…
Retinal Vascular Assessment in Psoriasis: A Multicenter Study
2021
PurposeTo investigate the vascular status of the macula in psoriasis patients without history of ocular inflammation by Optical Coherence Tomography Angiography (OCTA).MethodsThis prospective cross-sectional multicenter study included 55 psoriasis patients and 55 control healthy subjects. A complete eye examination and 6 mm × 6 mm OCTA imaging were performed. Retinal vascular status was evaluated by analyzing vascular density (VD) of superficial vascular plexus (superficial wVD) and deep vascular plexuses (deep wVD) in a 6 mm × 6 mm area and in foveal (superficial fVD and deep fVD) and parafoveal sectors (superficial pVD and deep pVD). In addition, foveal thickness (FT) and foveal avascular…
Cholesterol homeostasis and retinal stress in anterior ischemic optic neuropathy
2016
Purpose: Anterior ischemic optic neuropathy (AION) is characterized by acute stress of retinal ganglion cells (RGC). Cholesterol-24S-hydroxylase (CYP46A1) is specifically expressed in RGC where it may exert neuroprotective properties by preventing from cholesterol accumulation via catalyzing the formation of 24S-hydroxycholesterol. Previous findings hypothesize the housekeeping importance of CYP46A1 in the maintenance of cholesterol in the retina. In order to better understand the role of CYP46A1 in the retina, we aimed to define whether CYP46A1 expression and 24S-hydroxycholesterol levels were modified during RGC stress in AION.Methods: Ninety nine male Sprague Dawley rats were randomized …