A Review of Astigmatism - A Refractive Error correctable by Cylindrical glasses

Abstract

Background: Astigmatism is a type of refractive error. Some type of it can be corrected by Cylindrical type of glasses. It is found in clinical practice commonly. This review presents an overview of research that has been carried out examining various aspects of this refractive error. Objective: The present study was aimed to examine the components of astigmatism and the research into the prevalence and natural course of astigmatic refractive errors throughout life.. Materials and Methods: Study The prevalence of astigmatism in various diseases and syndromes is also discussed. We highlight the extensive investigations that have been conducted into the possible aetiology of astigmatism, however, no single model or theory of the development of astigmatism has been proven conclusively. Discussion: Observations and evidence from the literature supporting and contradicting these hypotheses are presented. Recent advances in technology such as wavefront sensors and videokeratoscopes have led to an increased understanding of ocular astigmatism. With continued improvements in technology, our knowledge of astigmatism and its genesis should continue to grow. Conclusion: With continued improvements in technology, our knowledge of astigmatism and its genesis should continue to grow.