Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Spherical equivalent"”.
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Analysis of Corneal Topographic Optical Zone and Decentration after Myopic Refractive Surgery
… ablation center in PRK group was preoperative spherical equivalent(p=0.016), while there was no factor influencing ablation zone in LASIK group. In PRK and LASIK group, the long axis of the ablation zone was longer than that of the programmed optical zone(p=0.003), while the short axis was …
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Structural and functional aspects of myopia in young adults. An investigation of nearwork-induced transient myopia and accommodation in relation to refractive stability.
… a greater extent. The higher the baseline mean spherical equivalent refractive error the larger the detrimental effect.
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Myopic Progression and Postoperative Exodrift in Patients with Intermittent Exotropia
… was determined by measuring the difference in spherical equivalent of both eyes between the initial and final refraction divided by the total follow-up time per patient. Postoperative exodrift was calculated by subtracting the deviation at postoperative 6 weeks from the deviation at the last …
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Evaluation of Ocular Pulse Amplitude-related Parameters measured by Dynamic Contour Tonometry and Ocular Blood Flow Analyzer
… OPA and POBF correlated significantly with the spherical equivalent of refractive error but not with central corneal thickness and blood pressure. Both POBF and ORF were significantly correlated with IOP measured by all the three devices. Although OPA and POBF did not correlate with glaucoma …
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Peripheral Refractive Error and its Association with Myopia Development and Progression. An examination of the role that peripheral retinal defocus may play in the origin and progression of myopia
… and nasal retina), at distance and near. Central spherical equivalent refractive error (SER) was used to classify the eyes as myopic (≤ −0.75 D), emmetropic (−0.75 < SER < +0.75 D) or hyperopic (≥ +0.75 D). Relative peripheral refraction was calculated as the difference between the central (i.e. …
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Lamina Cribrosa and Optic Nerve Head Geometry as a Function of Myopia in Older Normal Eyes
… (mean = 58.1 ± 7.4 years) with high myopia (spherical equivalent [SE] ≤ -6.00 D) and 16 older normal subjects (mean = 57.5 ± 6.8 years) with emmetropia to moderate myopia (SE = plano to -6.00 D). Retinal nerve fiber layer thickness (RNFLT) was quantified from 12° circular scans. ONH features …
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Applications of ray tracing to a pseudophakic eye model
… to 0.0 D(OS) and 0.1 D(OD) of the mean spherical equivalent. Adding prescribed lenses to the model eye, estimates best focus to 0.03 mm and 0.02 mm of the retinal plane; consistent with better than 6/6 VA measured for OS/OD. A VisTech VCTS 6500 contrast sensitivity chart is used to …
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Influence of ocular monochromatic aberrations in the development and/or progression of myopia
… in 2009-2010 (age, 17.1 ± 0.5 years). Change in spherical equivalent (M) from baseline to follow-up visit was determined and eyes characterised as ‘myopic change’ (≥ 0.50D), ‘no change’ (from 0.49D to +0.49D) and ‘hyperopic change’ (≥ +0.50D). Baseline data of eyes with ‘myopic change’ and ‘no …
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Physiological responses of human retina and choroid to retinal image defocus: Implications for myopia
… healthy young adults (age: 23 ± 3.5 years, spherical equivalent refraction (SER): +0.25 to -4.50 D) underwent global flash multifocal electroretinogram (gmfERG) testing under three lens-imposed defocus conditions (2.00 D myopic, 2.00 D hyperopic, and no defocus). Recordings were made …
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Structure-function relationships in Age-related macular degeneration in an era of multi-modal retinal imaging
… the eccentricities assessed, were age, gender, spherical equivalent and smoking. Finally, the results of this chapter agree with previously published work stating that the total retina is thicker in AMD individuals in the foveal area and that the RPE is thicker at all eccentricities assessed. …