Search results for "pupil"
showing 10 items of 181 documents
VIZUALINIS MOKTYTOJO ĮVAIZDIS: LYGINAMASIS TYRIMAS
2013
Dr. paed., Instituteof Educational Sciences, University of Latvia, Latvia. E-mail: iveta.kestere@lu.lv Address: Laimdotas 37, Rīga LV1006, Latvia Phone +371 29496660; +32 473 63 37 98PhD, Graduate School of Education, North West University, South Africa. E-mail: Charl.Wolhuter@nwu.ac.za Address: North-West University, Private Bag X 6001, Potchefstroom 2520, South AfricaPhD, Educational Sciences Department, Yeditepe University, Turkey. E-mail: ricardolozanov@gmail.comStraipsnyje „Vizualinis mokytojo įvaizdis: lyginamasis tyrimas“ pateikiami tyrimo, atlikto dešimtyje šalių – Anglijoje, Pietų Afrikoje, Serbijoje, Slovėnijoje, Graikijoje, Bulgarijoje, Latvijoje, Turkijoje, Pakistane ir Meksi…
W poszukiwaniu definicji szczęścia - oblicza szczęścia w percepcji przedszkolaków
2016
This papers aims to present the opinions of 54 kindergarten pupils from Public Kindergarten in Chrząstowice in the Opolskie province regarding how they understand and interpret the concept of happiness. The pupils were asked a number of questions regarding happiness, being happy and/or unhappy, situations when they are either happy or unhappy. The research material was further subjected to a qualitative analysis.
Short-Term Changes in Light Distortion in Orthokeratology Subjects
2015
Purpose. Quantifying adaptation to light distortion of subjects undergoing orthokeratology (OK) for myopia during the first month of treatment. Methods. Twenty-nine healthy volunteers (age: 22.34 ± 8.08 years) with mean spherical equivalent refractive error −2.10 ± 0.93D were evaluated at baseline and days 1, 7, 15, and 30 of OK treatment. Light distortion was determined using an experimental prototype. Corneal aberrations were derived from corneal topography for different pupil sizes. Contrast sensitivity function (CSF) was analyzed for frequencies of 1.50, 2.12, 3.00, 4.24, 6.00, 8.49, 12.00, 16.97, and 24.00 cpd under photopic conditions. Results. Average monocular values of all light di…
Changes in Pupil Area during Low-energy Femtosecond Laser-assisted Cataract Surgery
2018
Purpose: To study the potential changes in pupil area within low-energy femtosecond-laser assisted cataract surgery (FLACS). Methods: A retrospective assessment of the pupil size was performed in the eyes undergoing FLACS using the Ziemer LDV Z8. We measured the pupil diameters as part of the images taken preoperatively and at the completion of laser pretreatment (after releasing the suction). We calculated the pupil area in 40 eyes of 40 patients (14 right and 26 left eyes). The mean ± standard deviation (SD) of age of the patients was 74 ± 7.4 years (range: 51-87). Paired t-test was used for statistical analyses. Subgroups were built with reference to age and preoperative pupil area (smal…
Tuvākā skaidra redzes punkta noteikšanu ietekmējošie faktori
2021
Darbs ir uzrakstīts angļu valodā uz 25 lapaspusēm. Tajā ir 20 attēli, 2 tabulas un 20 literatūras avoti. Darba mērķis ir novērtēt dažādu faktoru – acs zīlītes un stimula izmēra- ietekmi uz tuvākā skaidras redzes punkta novērtēšanu. Tuvākais skaidras redzes punkts tika noteikts ar “push-up” metodi. Mērījumi tika veikti ar stimulu izmēriem 20/20; 20/25 un 20/30 (Snellena frakcija). Acs zīlītes diametrs tika novērtēts, izmantojot šablonu. Rezultāti parādīja, ka, samazinoties stimula izmēram “push-up” metodē, zīlītes diametrs pieaug un tuvākais skaidras redzes punkts attālinās.
Optical and visual quality comparison of implantable Collamer lens and laser in situ keratomileusis for myopia using an adaptive optics visual simula…
2012
Purpose. To compare optical and visual quality of the implantable Collamer lens (ICL) and laser in situ keratomileusis (LASIK) for myopia. Methods. An adaptive optics visual simulator (CRX1, Imagine Eyes, France) was used to simulate the vision after ICL implantation and LASIK procedure from the wavefront aberration pattern for -3 and -6 D. Monocular visual acuity (VA) at different contrasts and contrast sensitivity (CS) at 10, 20, and 25 cycles/degree (cpd) were measured for 3- and 5-mm pupils. Modulation transfer function (MTF) and point spread function (PSF) were calculated for a 5-mm pupil. Results. The ICL showed a MTF near of diffraction-limited MTF, but the post-LASIK of MTF worsened…
Modulation transfer function: Rigid versus foldable phakic intraocular lenses
2008
Purpose To study in a standard eye model the changes in modulation transfer function (MTF) of a monofocal intraocular lens (IOL) when a phakic IOL (pIOL) is placed in the anterior chamber, compare the MTFs of the rigid Artisan pIOL and foldable Artiflex pIOL, and evaluate the temporal evolution of the MTF of the foldable pIOL after the mechanical stress the pIOL undergoes when injected. Setting Fundacion Oftalmologica del Mediterraneo, Valencia, Spain. Methods The MTF values of the IOLs were calculated from the cross-line spread function recorded with the Opal Vector System. The measurements were taken using an eye model following the British and EN-ISO standards with 2.0 mm, 3.0 mm, 4.0 mm…
Elementary School Teachers' Experiences of Implementing the Teacher Classroom Management Method - Case Study in Finland
2023
The diversity of pupils and their different difficulties challenge teachers' skills and methods in teaching. Some behavioral challenges require rapid intervention and a multidisciplinary and interdisciplinary approach from the teachers. An internationally recognized tool, TCM (Teacher Classroom Management), aims to support pupils' socio-emotional development, improve teacher-pupil interaction, and strengthen school-home cooperation. This pilot study examines teachers' experiences of TCM in Finnish primary school context. The study is qualitative, and the data (N=16) was collected through focus group interviews. According to the results, the teacher's strengthened group management skills wer…
Effect of Phenylephrine on the Accommodative System
2016
Accommodation is controlled by the action of the ciliary muscle and mediated primarily by parasympathetic input through postganglionic fibers that originate from neurons in the ciliary and pterygopalatine ganglia. During accommodation the pupil constricts to increase the depth of focus of the eye and improve retinal image quality. Researchers have traditionally faced the challenge of measuring the accommodative properties of the eye through a small pupil and thus have relied on pharmacological agents to dilate the pupil. Achieving pupil dilation (mydriasis) without affecting the accommodative ability of the eye (cycloplegia) could be useful in many clinical and research contexts. Phenylephr…
Visual Comparison of an Artificial Pupil Contact Lens to Monovision
2012
PURPOSE To assess and compare the effects of contact-lens based artificial pupil design and monovision correction on visual performance. METHODS In a cross-over study design, 22 presbyopic patients (age range 50 to 64 years) were evaluated using artificial pupil contact lens on the non-dominant eye and monovision. After 1 month, binocular distance visual acuity (BDVA), binocular near visual acuity (BNVA), defocus curve, binocular distance contrast sensitivity, binocular near contrast sensitivity, and stereoacuity were measured, under photopic conditions (85 cd/m2), in each patient after contact lens fitting. Moreover, BDVA and binocular distance contrast sensitivity were examined under meso…