Hartingera refraktometrs perifērās refrakcijas noteikšanai
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Latvijas Universitāte
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Abstract
Bakalaura darbs ir uzrakstīts latviešu valodā uz 37 lapām, satur 20 attēlus, 1 pielikums un 23 atsauces uz literatūras avotiem.
Darba mērķis ir noteikt perifēro refrakciju, izmantojot Hartingera refraktometru, un izpētīt mērījumu atkārtojamību. Instrumenta gaismu nomainīja uz sarkanu LED(λ=635nm), vērā ņēma hromatiskās aberācijas(0.4D). 10 dalībniekiem noteica centrālo un perifēro refrakciju temporāli redzes laukā ik pa 5˚ līdz 30˚, nazāli 20˚, 25, 30˚.
Perifērās refrakcijas atkārtojamība horizontālā meridiānā ±0.82D(TI=95%), vertikālā ±0.74D, un centrālajai refrakcijai horizontālā meridiānā ±0.68D, vertikālā ±0.69D. Perifērās un centrālās refrakcijas mērījumu atkārtojamība nav statistiski ticami atšķirīga.
Atslēgas vārdi: Perifērā refrakcija, centrālās refrakcijas attīstība, Hartingera refraktometrs
Bachelor’s thesis is written in Latvian on 37 pages. It contains 20 illustrations and 1appendix, 23 references. Goal of the study: to perform measurements of peripheral refraction by use of Hartinger optometer and to determine repeatability of such measurements. Standard light source of instrument was changed to red LED illumination (λ=635nm), adjustment accounting for chromatic aberration of human eye 0.4D was introreduced. Central and peripheral refractions were obtained in 10 subjects for eccentricities temporally to 30˚ in 5˚ increments, nasally for 20˚, 25, 30˚. Repeatability of peripheral refraction is ±0.82D(CI=95%) in horizontal meridian and ±0.74D in vertical meridian. Repeatability of central refraction is ±0.68D in horizontal meridian, and ±0.69D in vertical. Repeatability of measurements of peripheral and central refraction is not statistically significantly different. Key Words: Peripheral refraction, central refractive development, Hartinger optometer
Bachelor’s thesis is written in Latvian on 37 pages. It contains 20 illustrations and 1appendix, 23 references. Goal of the study: to perform measurements of peripheral refraction by use of Hartinger optometer and to determine repeatability of such measurements. Standard light source of instrument was changed to red LED illumination (λ=635nm), adjustment accounting for chromatic aberration of human eye 0.4D was introreduced. Central and peripheral refractions were obtained in 10 subjects for eccentricities temporally to 30˚ in 5˚ increments, nasally for 20˚, 25, 30˚. Repeatability of peripheral refraction is ±0.82D(CI=95%) in horizontal meridian and ±0.74D in vertical meridian. Repeatability of central refraction is ±0.68D in horizontal meridian, and ±0.69D in vertical. Repeatability of measurements of peripheral and central refraction is not statistically significantly different. Key Words: Peripheral refraction, central refractive development, Hartinger optometer