Relevant bibliographies by topics / Hyperopic astigmatism

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Hyperopic astigmatism'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

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Journal articles on the topic "Hyperopic astigmatism"

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Varley, Gary A., David Huang, Christopher J. Rapuano, Steven Schallhorn, Brian S. Boxer Wachler, and Alan Sugar. "LASIK for hyperopia, hyperopic astigmatism, and mixed astigmatism." Ophthalmology 111, no. 8 (2004): 1604–17. http://dx.doi.org/10.1016/j.ophtha.2004.05.016.

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Bolinovska, Sofija. "Hyperopia in preschool and school children." Medical review 60, no. 3-4 (2007): 115–21. http://dx.doi.org/10.2298/mpns0704115b.

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Hypermetropia (hyperopia) is a refractive error of the eye in which parallel light rays focus behind the macula luthea without accommodation giving an unclear retinal image. The involvement of accommodation in correction of far-sightedness leads to the following three clinical types of hyperopia: total, latent and manifest. Minor hyperopias can be successfully corrected by accommodation higher than +3.0D. If not corrected timely, they may cause amblyopia and esotropia, while high hyperopic anisometropia of a hyperopic eye, usually results in an amblyopic eye. The study included 200 children (400 eyes) within the age range of 3 to 18 years, and it was done following the assigned protocol in the course of clinical ophthalmologic check-ups. The most frequent refractive error in the examined children was hyperopia with hyperopic astigmatism, while anisometropia was found in 22% of children but the frequency was reduced in older children. Refractive family history was found in 60.50% of children. Hyperopia can result in poor visual development, occurrence of amblyopia and strabismus and therefore it represents a significant public health problem. As one of the most frequent amblyogenic factors in children, it can be eliminated/prevented by a screening program and adequate treatment providing prevention of amblyopia, which is a form of blindness. .
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Zhang, Jing, and Yuehua Zhou. "Small incision lenticule extraction (SMILE) combined with allogeneic intrastromal lenticule inlay for hyperopia with astigmatism." PLOS ONE 16, no. 9 (2021): e0257667. http://dx.doi.org/10.1371/journal.pone.0257667.

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Purpose To quantitatively evaluate outcomes after small incision lenticule extraction (SMILE) combined with allogeneic intrastromal lenticule inlay for hyperopia with astigmatism. Methods It’s a retrospective cohort study. Twenty-four eyes of 15 patients with more than 0.75 diopters (D) of astigmatism in hyperopic eyes were enrolled in this study. The hyperopic eye with astigmatism was first treated with SMILE to correct astigmatism; then a lenticule was extracted from a donor myopic eye and subsequently implanted into the hyperopic eye with astigmatism. Patients were examined preoperatively and 1 day, 1 week, 1,3 months and 1 year after surgery. The main outcome measures were the uncorrected and corrected distance visual acuity (UDVA and CDVA), uncorrected near visual acuity (UNVA), spherical equivalent (SE), corneal topography, anterior segment optical coherence topography (OCT) and ocular response analyzer (ORA) parameters: corneal hysteresis (CH) and corneal resistance factor (CRF). Repeated–measures analyses of variance (ANOVA) and post hoc tests were used to analyze data of different follow-up visits. Results The mean preoperative cylinder was 1.95±1.04(D). The UDVA (from 0.37±0.23 to 0.09±0.09), UNVA (from 0.49±0.21 to 0.08±0.06), SE (from +7.42±3.12 to -0.75±0.79) and astigmatism (+1.95±1.04 to -0.65±0.63) postoperatively were obviously better than those before surgery. Five eyes (26.3%) gained one line of CDVA, and 3 eyes (15.8%) gained two lines of CDVA one year after surgery compared with preoperative levels. The average corneal curvature was changed from (43.19±4.37) D to (49.19±3.87) D one year after surgery. The anterior segment OCT images of corneas with lenticule inlays at each follow-up visit showed that the implanted lenticule was shaped like a crescent in the corneal stroma. The CH and CRF didn’t change significantly after surgery (p = 0.189 and p = 0.107respectively). Conclusions SMILE combined with intrastromal lenticule inlay can be used to correct high hyperopia with astigmatism with good safety, efficacy and reproducibility.
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Brutskaia, L. "Hyperopic astigmatism and strabismus." Oftalmologicheskii Zhurnal 66, no. 2 (2017): 74. http://dx.doi.org/10.31288/oftalmolzh2017274.

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Argento, Carlos J., María J. Cosentino, and Alejandro Biondini. "Treatment of hyperopic astigmatism." Journal of Cataract & Refractive Surgery 23, no. 10 (1997): 1480–90. http://dx.doi.org/10.1016/s0886-3350(97)80018-1.

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Bolinovska, Sofija, and Jovan Popovic. "Cyclopentolate as a cycloplegic drug in determination of refractive error." Medical review 61, no. 7-8 (2008): 327–32. http://dx.doi.org/10.2298/mpns0808327b.

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Cycloplegia is loss of the power of accommodation with inhibition of a ciliary muscle. We obtain in this way the smallest refraction of the lens and make it possible to determine the presence and size of the particular refractive error in cycloplegia by using cyclopentolate. Cyclopentolate is a synthetic anticholinergic drug and antagonist of the muscarine receptors. If applied in the eye, it blocks the effect of cholinergic stimulation on the sphincter pupillae muscle and ciliary muscle. It provokes severe mydriasis (dilation of the pupil) and cycloplegia (paralysis of the accommodation). Cyclopentolate has been used occasionaly in diagnostic purposes: defining ocular refraction and in ophthalmoscopy. This is the prospective study which included 200 children (400 eyes) aged 3-18 years, carried out in one ambulatory ophthalmological examination. The results were analysed using standard statistical methods. The most often refractive error in the examined group of children is hyperopia with hyperopic astigmatism, then myopia with myopic astigmatism and mixtus astigmatism are the most often in the oldest group of children. The mean value of corneal astigmatism on the right eye was 1.24 D, on the left eye 1.23 D. Anisometropy was found in 40% children. The presence of myopia, myopic and astigmatism mixtus tended to increase, and hyperopia and hyperopic astigmatism tended to decrease toward older groups of children. Refractive error could result in a poor development of visual acuity, causing amblyopia and strabismus, and because of that represents an important public health problem. As one of amblyogenic risk factors in children, it can be prevented with screening program and appropriate treatment, thus providing prevention of amblyopia as one form of blindness.
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Yahya, Arifah Nur, Sharanjeet Sharanjeet-Kaur, and Saadah Mohamed Akhir. "Distribution of Refractive Errors among Healthy Infants and Young Children between the Age of 6 to 36 Months in Kuala Lumpur, Malaysia—A Pilot Study." International Journal of Environmental Research and Public Health 16, no. 23 (2019): 4730. http://dx.doi.org/10.3390/ijerph16234730.

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Uncorrected refractive error, especially myopia, in young children can cause permanent visual impairment in later life. However, data on the normative development of refractive error in this age group is limited, especially in Malaysia. The aim of this study was to determine the distribution of refractive error in a sample of infants and young children between the ages of 6 to 36 months in a prospective, cross-sectional study. Cycloplegic retinoscopy was conducted on both eyes of 151 children of mean age 18.09 ± 7.95 months. Mean spherical equivalent refractive error for the right and left eyes was +0.85 ± 0.97D and +0.86 ± 0.98D, respectively. The highest prevalence of refractive error was astigmatism (26%), followed by hyperopia (12.7%), myopia (1.3%) and anisometropia (0.7%). There was a reduction of hyperopic refractive error with increasing age. Myopia was seen to emerge at age 24 months. In conclusion, the prevalence of astigmatism and hyperopia in infants and young children was high, but that of myopia and anisometropia was low. There was a significant reduction in hyperopic refractive error towards emmetropia with increasing age. It is recommended that vision screening be conducted early to correct significant refractive error that may cause disruption to clear vision.
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Alió del Barrio, Jorge L., Mauro Tiveron, Ana B. Plaza-Puche, et al. "Laser-Assisted in Situ Keratomileusis with Optimized, Fast-Repetition, and Cyclotorsion Control Excimer Laser to Treat Hyperopic Astigmatism with High Cylinder." European Journal of Ophthalmology 27, no. 6 (2017): 686–93. http://dx.doi.org/10.5301/ejo.5001051.

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Purpose To evaluate the visual outcomes after femtosecond laser-assisted laser in situ keratomileusis (LASIK) surgery to correct primary compound hyperopic astigmatism with high cylinder using a fast repetition rate excimer laser platform with optimized aspheric profiles and cyclotorsion control. Methods Eyes with primary simple or compound hyperopic astigmatism and a cylinder power ≥3.00 D had uneventful femtosecond laser-assisted LASIK with a fast repetition rate excimer laser ablation, aspheric profiles, and cyclotorsion control. Visual, refractive, and aberrometric results were evaluated at the 3- and 6-month follow-up. The astigmatic outcome was evaluated using the Alpins method and ASSORT software. Results This study enrolled 80 eyes at 3 months and 50 eyes at 6 months. The significant reduction in refractive sphere and cylinder 3 and 6 months postoperatively (p<0.01) was associated with an improved uncorrected distance visual acuity (p<0.01). A total of 23.75% required retreatment 3 months after surgery. Efficacy and safety indices at 6 months were 0.90 and 1.00, respectively. At 6 months, 80% of eyes had an SE within ±0.50 D and 96% within ±1.00 D. No significant differences were detected between the third and the sixth postoperative months in refractive parameters. A significant increase in the spherical aberration was detected, but not in coma. The correction index was 0.94 at 3 months. Conclusions Laser in situ keratomileusis for primary compound hyperopic astigmatism with high cylinder (>3.00 D) using the latest excimer platforms with cyclotorsion control, fast repetition rate, and optimized aspheric profiles is safe, moderately effective, and predictable.
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Pallikaris, Ioannis G., Tatiana L. Naoumidi, and Nikos I. Astyrakakis. "Conductive Keratoplasty to Correct Hyperopic Astigmatism." Journal of Refractive Surgery 19, no. 4 (2003): 425–32. http://dx.doi.org/10.3928/1081-597x-20030701-08.

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Hosny, Hesham M., Adel M. Abdul Wahab, and Mona El Sayed Ali H. "Is Lasik an Effective Treatment Modality for Hyperopia or Hyperopic Astigmatism ?" Egyptian Journal of Hospital Medicine 60 (July 2015): 354–62. http://dx.doi.org/10.12816/0013794.

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Dissertations / Theses on the topic "Hyperopic astigmatism"

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Akuta, Godwin Chukwuemeka. "Prevalence of refractive errors among primary school children (7-14 years) in Motherwell Township, Eastern Cape, South Africa." Thesis, University of Limpopo, 2015. http://hdl.handle.net/10386/1751.

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Thesis (MPH.) --University of Limpopo, 2015
Background: Uncorrected refractive errors remain a public health problem among different population and age groups worldwide, including South Africa. Refractive error has serious visual and functional impacts on those affected. In children, refractive errors may negatively affect the academic pursuits and activities of daily living such as reading. Aims and Objectives: To determine and document the prevalence, types and magnitude together with age and gender differences of refractive errors among primary school children in Motherwell Township, Eastern Cape Province, South Africa. Methods: This was a quantitative, cross sectional refractive error study. Four hundred and twenty one (421) school children aged 7 – 14 years were randomly selected from five randomly selected schools in Motherwell Township, Eastern Cape Province, South Africa. Visual examination which included unaided and aided visual acuity (with LogMAR E chart), non-cycloplegic autorefraction, subjective refraction, internal and external examination of the eye using an ophthalmoscope was conducted. Refractive errors were measured with an autorefractor, refined subjectively and findings presented in spherical form. Hyperopia was defined as a spherical equivalent (SE) of +0.50 D or greater, myopia as spherical equivalent of -0.50 D or greater. A cylindrical power of -0.50 DC (D cylinder) or greater was considered as astigmatism. Results: The prevalence of hyperopia, myopia and astigmatism among the children were 25.2%, 18.7% and 58.0% respectively. Hyperopia ranged from +0.50 to +3.62 D and myopia ranged from -0.50 D to -20.25 D in the right eyes with a mean of -0.17 ± 1.7 D. In the left eye, hyperopia ranged from +0.50 to +2.62 D and myopia ranged from -0.50 to -20.62 D with a mean of -0.12 ± 1.7 D. Astigmatism in the right eyes ranged from -0.50 to -5.50 D with a mean of -0.6 ± 0.52 D and in the left eye ranged from -0.50 to -4.00 D with a mean of -0.6 ± 0.45 D respectively. Association between hyperopia and age was not statistically significant (p = 0.839), also refractive error and gender was statistically insignificant (p = 0.120). Against-the-rule (ATRA) astigmatism (43.4%) was more common, followed by with-the-rule (WTRA) astigmatism (39.0%) and oblique, (all other meridians) (17.6%). There was a significant association between types of astigmatism and age (p = 0.05), more so inter-gender difference in the prevalence of different types of astigmatism was not statistically significant (p = 0.774). Conclusion: The study concludes that refractive error has high prevalence of 43.9% in this children population. Astigmatism (58.0%) was more common followed by hyperopia (25.2%) v and myopia (18.7%). Although hyperopia was not age dependent, there was obvious relationship pattern between female genders and hyperopia in the present study. Population-based vision screening or at least school visual screening in the rural communities of Motherwell Township is, therefore recommended. Vision screening and proper eye examination with appropriate optical compensation will improve the activity of daily living and quality of life of those affected. Key words: Refractive error, hyperopia, myopia, astigmatism, school children
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De, Bie Ellinor. "Prevalensen av hyperopi och astigmatism hos barn med ospecifika läs- och skrivsvårigheter respektive barn med dyslexi." Thesis, Linnéuniversitetet, Institutionen för medicin och optometri (MEO), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-36016.

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Syfte:Målet med studien var att undersöka om prevalensen av hyperopi (och inducerad hyperopi) och astigmatism skiljer sig mellan barn med dyslexi och barn med ospecifika läs- och skrivsvårigheter. Blir de hjälpta av eventuell korrektion? Metod:Skolpedagoger i Kalmar, Nybro och Mörbylånga lämnade ut inbjudan för synundersökning till barn med läs-och skrivsvårigheter.Synundersökninanra genomfördes på C-optik synklinik i Kalmar.Tjugofyra barn med ospecefika läs- och skrivsvårigheter och nio barn med dyslexi deltog i undersökningen . En tid efter synundersökningen kontaktades förädrar för en uppföljningsintervju. Resultat: Jämförelse mellan grupperna visade ingen skillnad med avseende refraktion. Alla barn som deltog förutom ett, ordinerades korrektion för hyperopi. Ett barn var myopt med inducerad hyperopi. Samtliga barn förutom ett ordinerades korrektion för astigmatism. Efter en tid gjorde ett uppföljnings samtal till föräldrarna. Alla barn förutom ett använde sina glasögon. Många av barnen hade fått minskade besvär som var relaterade till okorrigerade synfel.
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Ghanem, Ramon Coral. "Ceractomia fotorrefrativa (PRK) com mitomicina C baseada na análise de frentes de onda corneanas para o tratamento da hipermetropia consecutiva à ceratotomia radial." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/5/5149/tde-20122010-172917/.

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OBJETIVO: Avaliar a eficácia, estabilidade, previsibilidade e segurança da ceratectomia fotorrefrativa (PRK) guiada pelas frentes de onda corneana para o tratamento da hipermetropia secundária à ceratotomia radial (CR). MÉTODOS: Foram avaliados prospectivamente 61 olhos de 39 pacientes consecutivos, submetidos a PRK personalizado com o laser Esiris-Schwind. A técnica constou de desepitelização mecânica, fotoablação, e utilização de mitomicina C (MMC) 0,02% por 20 ou 40 segundos. A MMC foi aplicada por 40 segundos em 17 olhos (27,9%) que haviam sido submetidos a ablações mais profundas do que 100 ?m ou apresentavam córneas previamente suturadas. As avaliações pós-operatórias foram realizadas após sete dias, um, seis, 12 e 24 meses. Todos os olhos foram avaliados após um ano e dois anos. RESULTADOS: O intervalo médio entre a CR e o PRK foi de 18,8 anos ± 3,8 (DP); o equivalente esférico (EE) médio antes da ceratotomia radial era -4,10 dioptrias (D) ± 1,44. As medidas prévias ao PRK mostraram EE médio de +4,17 D ± 1,97; astigmatismo médio de -1,39 D ± 1,04; AV com correção (AVcc) média de 0,161 ± 0,137 (logMAR); e curvatura corneana média de 35,85 ± 3,60 D. Os resultados encontrados dois anos após a cirurgia foram: EE médio de 0,14 ± 0,99 D (p < 0,001); astigmatismo médio de -1,19 ± 1,02 D (p = 0,627); AV sem correção (AVsc) média de 0,265 ± 0,196 (p < 0,001); AVcc média de 0,072 ± 0,094 (p < 0,001); e curvatura corneana média de 39,01 ± 3,18 D (p < 0,001). AVsc igual ou melhor a 20/25 foi observada em 38% dos olhos e igual ou melhor a 20/40 em 69%. A AVcc melhorou em 62,3% dos olhos, sendo que 21 olhos (34,4%) melhoraram uma linha e outros 17 olhos (27,9%), duas ou mais linhas. Um olho (1,6%) perdeu duas linhas devido ao astigmatismo irregular ocasionado por opacificação corneana periférica. Outro olho perdeu três linhas pelo desenvolvimento de ectasia corneana entre seis e 24 meses, devido ao alargamento progressivo de uma incisão radial inferior, e foi posteriormente submetido à sutura da incisão. Houve 30 olhos (49,2%) entre ± 0,50 D do EE planejado e 45 (73,8%) entre ± 1,00 D. Entre seis e 24 meses, a regressão média do EE foi de +0,39 D (p < 0,05) e cinco olhos (8,3%) sofreram desvio hipermetrópico > 1,00 D. Ocorreu redução estatisticamente significante do coma (p = 0,001), trefoil (p = 0,008), aberração esférica (p < 0,001), astigmatismo secundário (p = 0,001) e quatrefoil (p < 0,001). Não houve mudança estatisticamente significativa da contagem endotelial (p = 0,161). Dois olhos (3,3%) desenvolveram opacificação corneana periférica grau 2 e um, grau 3. CONCLUSÃO: O PRK personalizado pelas frentes de onda corneana coadjuvado pela MMC foi eficaz, previsível e seguro pelo período de dois anos para a redução da hipermetropia após a CR. No pós-operatório observou-se melhora significativa da AVsc, AVcc e das aberrações corneanas. Constatou-se, entretanto, que a hipermetropia consecutiva à CR continua a progredir após o tratamento com o excimer laser.
PURPOSE: To assess the efficacy, stability, predictability and safety of corneal wavefront-guided photorefractive keratectomy (PRK) for correcting hyperopia after radial keratotomy (RK). METHODS: In a prospective study, 61 eyes of 39 consecutive patients were treated with PRK using an Esiris-Schwind excimer laser. Corneal epithelium was mechanically removed, followed by photoablation and use of 0.02% mitomycin C (MMC) for 20 or 40 seconds. MMC was used for 40 seconds in 18 eyes (27.9%) which underwent ablations deeper than 100 micron or had previous corneal sutures. Postoperative evaluations were performed after seven days, six, 12 and 24 months. All patients were followed up for two years. RESULTS: The mean time between RK and PRK was 18.8 years ± 3.8 (SD); mean spherical equivalent (SE) before RK was -4.10 diopters (D) ± 1.44. Before PRK, the mean SE was +4.17 D ± 1.97, mean astigmatism was -1.39 D ± 1.04, the mean best-corrected visual acuity (BCVA) was 0.161 ± 0.137 (logMAR) and the mean corneal curvature was 35.85 ± 3.60 D. At 24 months, mean SE was 0.14 ± 0.99 D (p < 0.001), mean astigmatism was -1.19 ± 1.02 D (p = 0.627), mean UCVA was 0.265 ± 0.196 (p < 0.001), mean BSCVA was 0.072 ± 0.094 (p < 0.001) and the mean corneal curvature was 39.01 ± 3.18 D (p < 0.001). UCVA was 20/25 or better in 38% of eyes and 20/40 or better in 69%. BCVA improved in 62.3% of eyes, with 21 (34.4%) gaining one line and 17 (27.9%), two or more lines. One eye (1.6%) lost two lines due to irregular astigmatism and peripheral haze. Another eye lost three lines due to keratectasia occurring between six and 24 months resulting from widening of an inferior radial incision that was later sutured. Thirty eyes (49.2%) were within ± 0.50 D of intended SE and 45 (73.8%) were within ± 1.00 D. From six to 24 months, the mean SE regression was +0.39 D (p < 0.05) and five eyes (8.3%) had a hyperopic shift > 1.00 D. A significant decrease in coma (p = 0.001), trefoil (p = 0.008), spherical aberration (p < 0.001), secondary astigmatism (p = 0.001) and quatrefoil (p < 0.001) was observed. Endothelial cell counts did not show a statistically significant decrease (p = 0.161). Two eyes (3.3%) developed peripheral haze grade 2 and one, grade 3. CONCLUSION: Corneal wavefront-guided PRK with MMC was effective, predictable and safe after two years for the treatment of hyperopia after RK. A significant improvement in UCVA, BSCVA and corneal aberrations was obtained. However, hyperopic shift after RK continued to progress after excimer laser surgery.
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Helal, Shirin Nadia [Verfasser], and Gisbert [Akademischer Betreuer] Richard. "Einfluss der Wahl der Zentrierungsachse bei LASIK auf den Winkel Kappa prä- und intraoperativ bei Hyperopie, Myopie und gemischtem Astigmatismus / Shirin Nadia Helal. Betreuer: Gisbert Richard." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2015. http://d-nb.info/1070188379/34.

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Mulungwa, Justice. "Determinants of seeking eye care services among Grade 8 to 12 learners in Giyani, South Africa." Diss., 2016. http://hdl.handle.net/11602/851.

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Baloyi, Voster Hlawulani Austine. "The Pattern of Distribution of Refractive Error among Primary School Children of Malamulele Community, Vhembe District, Limpopo Province." Diss., 2016. http://hdl.handle.net/11602/850.

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Books on the topic "Hyperopic astigmatism"

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Judd, Sandra J. Eye care sourcebook: Basic consumer health information about vision and disorders affecting the eyes and surrounding structures, including facts about hyperopia, myopia, presbyopia, astigmatism, cataracts, macular degeneration, glaucoma, and other disorders of the cornea, retina, macula, conjunctiva, and optic nerve; along with guidelines for recognizing and treating eye emergencies, advice about protecting the eyes at work, home, and play, tips for living with low vision ... 5th ed. Omnigraphics, 2012.

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Eye care sourcebook : basic consumer health information about vision and disorders affecting the eyes and surrounding structures, including facts about hyperopia, myopia, presbyopia, astigmatism, cataracts, macular degeneration, glaucoma, and other disorders of the cornea, retina, macula, conjunctiva, and optic nerve ; along with guidelines for recognizing and treating eye emergencies, advice about protecting the eyes at work, home, and play, tips for living with low vision, a glossary of terms related to the eyes and eye disorders, and a directory of resources for further information. Omnigraphics, 2017.

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Book chapters on the topic "Hyperopic astigmatism"

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Alpins, Noel. "Refractive Lens Exchange for High Hyperopic Astigmatism Followed by LASIK." In Difficult and Complicated Cases in Refractive Surgery. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-55238-0_7.

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de la Cruz, Jose, Tae-im Kim, and Dimitri T. Azar. "LASIK for Myopia, Hyperopia, and Astigmatism." In Albert and Jakobiec's Principles and Practice of Ophthalmology. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-319-90495-5_227-1.

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Schmidt, W. "Der Holmium:YAG-Laser in der refraktiven Hornhautchirurgie — Einsatzmöglichkeiten bei der Korrektur der Hyperopie, Myopie und des Astigmatismus." In 9. Kongreß der Deutschsprachigen Gesellschaft für Intraokularlinsen Implantation. Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-93570-1_72.

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Moreno, Eva, Maria Iradier, Federico Moreno, and Jose Hernandez. "Lasik For Hyperopic Astigmatism." In Dr Agarwals’ Step by Step LASIK Surgery. Jaypee Brothers Medical Publishers (P) Ltd., 2005. http://dx.doi.org/10.5005/jp/books/10238_5.

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Moreno, Eva, Maria Iradier, Federico Moreno, and Jose Hernandez. "Lasik for Hyperopic Astigmatism." In Mastering the Techniques of Corneal Refractive Surgery. Jaypee Brothers Medical Publishers (P) Ltd., 2006. http://dx.doi.org/10.5005/jp/books/10500_29.

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Moreno, Eva, Maria Iradier, Federico Moreno, and Jose Hernandez. "LASIK for Hyperopic Astigmatism." In Mastering the Techniques of Presbyopia Surgery. Jaypee Brothers Medical Publishers (P) Ltd., 2006. http://dx.doi.org/10.5005/jp/books/10508_25.

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"LASIK for Hyperopia, Hyperopic Astigmatism, and Presbyopia." In LASIK (Laser in Situ Keratomileusis). CRC Press, 2002. http://dx.doi.org/10.3109/9780203913109-23.

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Vinciguerra, Paolo, and Fabrizio Camesasca. "Surgical Treatment Options for Hyperopia and Hyperopic Astigmatism." In Hyperopia and Presbyopia. CRC Press, 2003. http://dx.doi.org/10.1201/b14217-8.

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C, Carmen. "Surgical Correction of Hyperopic Astigmatism." In Dr. Hoyos’ Step by Step Astigmatic Ablation. Jaypee Brothers Medical Publishers (P) Ltd., 2006. http://dx.doi.org/10.5005/jp/books/10235_3.

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Athiya, Agarwal. "Chapter-141 LASIK for Hyperopic Astigmatism." In Textbook of Ophthalmology (Vol 1)-Amar Agarwal. Jaypee Brothers Medical Publishers (P) Ltd., 2002. http://dx.doi.org/10.5005/jp/books/10931_141.

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Conference papers on the topic "Hyperopic astigmatism"

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Pinsky, Peter M., and Dolf van der Heide. "Modeling the Optical Performance of the Human Cornea Following Refractive Surgery." In ASME 2008 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2008. http://dx.doi.org/10.1115/sbc2008-192579.

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Abstract:
Disturbances of the stromal microstructure occurring in refractive surgical procedures may create unexpected and undesired changes to the vision quality of the eye. Examples of common procedures which can profoundly alter the integrity of the stroma include laser ablation techniques such as Laser in situ keratomileusis (LASIK) for treating myopia, hyperopia and astigmatism, scleral incisions for lens extraction in cataract surgery and conducting keratoplasty (CK) for the treatment of hyperopia and presbyopia. The stroma is the primary load-carrying layer of the cornea and in the normal eye it is in a state of tension resulting from the intraocular pressure (IOP). When a surgical procedure disrupts the stromal tissue, the stresses in the tissue will be redistributed inducing what may be called the biomechanical response of the tissue to the surgical procedure. In the case of LASIK and CK, for example, surgeons wish to change the optical power of the cornea by reshaping the anterior surface. Biomechanically induced deformations may cause the achieved power to deviate from the planned correction and may also introduce aberrations in the resulting optical path. In contrast, in cataract surgery, surgeons may wish to preserve the original power of the cornea and in this case biomechanical deformations may defeat this objective.
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2

Beck, Rasmus, and Werner Foerster. "Excimer laser delivery system for astigmatic and hyperopic photorefractive surgery." In OE/LASE '94, edited by Jean-Marie A. Parel and Qiushi Ren. SPIE, 1994. http://dx.doi.org/10.1117/12.178557.

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