Sökning: "visual acuity"

Visar resultat 6 - 10 av 109 avhandlingar innehållade orden visual acuity.

1. 6. Reading acquisition in pupils with visual impairments in mainstream education

   Författare :Kerstin Fellenius; Karin Taube; Stockholms universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; pupils; visual impairment; reading acquisition; reading environment; braille display; cerebral visual impairment; pedagogik; Education;

   Sammanfattning : This thesis is based on five empirical studies of pupils with visual impairments, their reading ability and processes of reading acquisition within the framework of mainstream education in comprehensive schools. The aim of the thesis is to increase our understanding and knowledge of reading acquisition in pupils with visual impairments in mainstream education. LÄS MER

3. 7. Optics for Low Vision Enabling

   Författare :Jörgen Gustafsson; Certec - Rehabiliteringsteknik och Design; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Eccentric viewing; Low vision optics; Low vision rehabilitation; People with low vision; Preferred retinal; locus PRL ; Resolution; Visual acuity; Ophtalmology; Medicinsk teknik; Medical technology; Rehabilitering medicinsk och social ; rehabilitation; revalidation; kinesitherapy; Oftalmologi; Physical medicine; Contrast sensitivity; Detection; Eccentric correction; CFL ; Central visual field loss; Central scotoma; Aberrations; Astigmatism;

   Sammanfattning : For people with central visual field loss, eccentric vision is all that they have to rely on. Even for those who learn how to correctly utilize their eccentric vision, it will never be as good as the central for two entirely different reasons: the off-axis optics of the eye can result in large refractive errors, and the low function of the peripheral retina. LÄS MER

4. 8. On the identification of visual defects in children in general and prematurely born children in particular

   Författare :Anna-Lena Hård; Göteborgs universitet; []
   Nyckelord :preschool vision screening; referral criteria; children; vision; preterm; cerebral visual impairment; visual perception; ocular fundus morphology;

   Sammanfattning : Aims: Papers I & II: To evaluate the consequences of changes in the criteria for referral to an eye clinic following general pre-school vision screening. According to the former criteria all 4 year old children in the Göteborg area, with visual acuity (VA) ... LÄS MER

5. 9. On vision in old age. A longitudinal study of subjects 70 to 97 years old

   Författare :Birgitta Bergman; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; elderly; hearing impairment; intervention; longitudinal study; ocular disorders; old; risk factors; visual ability; visual acuity VA ;

   Sammanfattning : Aims. The main purpose of this study was to investigate different aspects of vision and visual function in old people, like change in vision and visual ability, to study the natural course of eye diseases, assess needs of visual intervention, investigate risk factors for ocular disorders late in life, and also to investigate coexistence between visual and hearing impairments. LÄS MER

7. 10. On the necessity of screening and national registration of congenital cataracts

   Författare :Gunilla Magnusson; Göteborgs universitet; []
   Nyckelord :congenital cataract; glaucoma; intraocular surgery; posterior capsular opacification PCO ; prevalence; visual acuity VA ; visual impairment; screening; newborn examination; blindness prevention; cost-utility analysis; quality- adjusted life year QALY ;

   Sammanfattning : Objectives: The overall aim of this thesis was to contribute to improvements in the management of congenital cataract by defining the most efficient screening procedure, examining the magnitude of the morbidity rate, optimizing the timing of surgery by relating surgical outcome to age at intervention and severity of visual deprivation and furthermore by evaluating costs versus consequences of introducing the most efficient screening procedure found, on a national basis.Methods: Paper I: 72 children born between 1992 and 1998 in the Stockholm County Council region, Västra Götaland and Halland county, Linköping-Motala, Malmö, and Lund, who had surgery for congenital cataract before the age of one year were included in a retrospective study. LÄS MER