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2008-05-15
Irregular Astigmatism: Diagnosis and Treatment - de Ming Wang M.D. Ph.D. (Author)
Caractéristiques Irregular Astigmatism: Diagnosis and Treatment
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| Le Titre Du Livre | Irregular Astigmatism: Diagnosis and Treatment |
| Date de Lancement | 2008-05-15 |
| Traducteur | Tahsina Ecrin |
| Numéro de Pages | 433 Pages |
| Taille du fichier | 38.94 MB |
| Langue | Français & Anglais |
| Éditeur | Wakefield Press |
| ISBN-10 | 8382679169-RFC |
| Type de eBook | PDF AMZ ePub HTML QUOX |
| Auteur | Ming Wang M.D. Ph.D. |
| Digital ISBN | 325-5782877957-RNM |
| Nom de Fichier | Irregular-Astigmatism-Diagnosis-and-Treatment.pdf |
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Astigmatism is a very common eye condition thats easily corrected by eyeglasses or contact lenses and on some occasions surgery
Lastigmatisme est un type dinexactitude réfringente dans lequel la forme de la surface normalement incurvée de la cornée est courbée à différents degrés dans différents endroits
Irregular Astigmatism Irregular change of refractive power in different meridia
Astigmatism Detroit Refractive Eye Surgery Specialist – Dr Weingarten Astigmatism Astigmatism is caused by an irregular curvature of the cornea
Signs and symptoms Although astigmatism may be asymptomatic higher degrees of astigmatism may cause symptoms such as blurry vision double vision squinting eye strain fatigue or headaches Some research has pointed to the link between astigmatism and higher prevalence of migraine headaches
Also the efficacy of CXL would likely increase if the treatment were limited to eyes with a maximum K reading of less than 5800 D More studies are necessary to identify rare complications and to establish a list of indications regarding patient age diagnosis pellucid marginal degeneration versus keratoconus and the stage of keratectasia
IAI Irregular Astigmatism Index The IAI reflects the variation of keratometric power between each ring along a given meridian OSI Opposite Sector Index The corneal surface is divided into 8 equal sectors each subtending an angle of 45° The mean power of each sector is calculated and the OSI is equal to the maximum difference measured between two opposite sectors The value of OSI is increased in case of irregular astigmatism characterized by the presence of a high degree of asymmetry