Effects of pterygium on corneal spherical power and astigmatism

Tomidokoro, Atsuo; Miyata, Kazunori; Sakaguchi, Yasuhisa; Samejima, Tomokazu; Tokunaga, Tadatoshi; Oshika, Tetsuro

doi:10.1016/s0161-6420(00)00219-0

Cited by 115 publications

(111 citation statements)

References 12 publications

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“…[83][84][85] Typically, the shift in astigmatism is an increase in (asymmetric) WTR astigmatism brought about by a flattening of the cornea that occurs in the horizontal meridian between the corneal apex and the head of the pterygium. [83][84][85] The specific cause of this corneal flattening is thought to be a tear pooling effect near the head of the pterygium, 86 mechanical tractional forces on the cornea from the pterygium 85,86 or a combination of these factors. The size of the pterygium appears to be related to the magnitude of the induced astigmatism.…”

Section: Astigmatism Resulting From Ocular Surgerymentioning

confidence: 99%

“…Surgery to remove pterygia typically leads to a reduction of the induced WTR astigmatism and an increase in the regularity and symmetry of corneal topography. 84,85,87 The amount of astigmatic change brought about by surgery for pterygium appears to be related to the preoperative size of the pterygium. 84 Another ocular surgical procedure that can result in significant amounts of corneal astigmatism postoperatively is penetrating keratoplasty.…”

Section: Astigmatism Resulting From Ocular Surgerymentioning

confidence: 99%

“…84,85,87 The amount of astigmatic change brought about by surgery for pterygium appears to be related to the preoperative size of the pterygium. 84 Another ocular surgical procedure that can result in significant amounts of corneal astigmatism postoperatively is penetrating keratoplasty. Newer surgical techniques, such as nonmechanical trephination with the Excimer laser, also appear to lead to a reduction in post-operative astigmatism compared to traditional mechanical trephination techniques.…”

Section: Astigmatism Resulting From Ocular Surgerymentioning

confidence: 99%

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A review of astigmatism and its possible genesis

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Collins

Carney

2007

Clinical and Experimental Optometry

234

205

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Astigmatism is a refractive condition encountered commonly in clinical practice. This review presents an overview of research that has been carried out examining various aspects of this refractive error. We examine the components of astigmatism and the research into the prevalence and natural course of astigmatic refractive errors throughout life. The prevalence of astigmatism in various ethnic groups and 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. Theories of the development of astigmatism based on genetics, extraocular muscle tension, visual feedback and eyelid pressure are considered. 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 and with continued improvements in technology, our knowledge of astigmatism and its genesis should continue to grow.

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Section: Astigmatism Resulting From Ocular Surgerymentioning

confidence: 99%

Section: Astigmatism Resulting From Ocular Surgerymentioning

confidence: 99%

Section: Astigmatism Resulting From Ocular Surgerymentioning

confidence: 99%

See 1 more Smart Citation

A review of astigmatism and its possible genesis

Read

Collins

Carney

2007

Clinical and Experimental Optometry

234

205

View full text Add to dashboard Cite

show abstract

“…22 Piterjiyum eksizyonu ile kornea üzerindeki çekintinin azalması sonucu korneal astigmatizma azalmaktadır. 22,23 Tedavi olarak eksize edilen doku arttıkça, düzeltilen astigmat miktarı da artmaktadır. 22,23 Piterjiyumda postoperatif astigmattaki azalmaya paralel olarak görme keskinliğinde artış bildirilmektedir.…”

Section: Discussionunclassified

“…22,23 Tedavi olarak eksize edilen doku arttıkça, düzeltilen astigmat miktarı da artmaktadır. 22,23 Piterjiyumda postoperatif astigmattaki azalmaya paralel olarak görme keskinliğinde artış bildirilmektedir. 8,23 Pujol ve ark., piterjiyumlu 29 hastada uyguladıkları limbal konjonktival otogreft tedavisi ile postoperatif birinci ayda korneal astigmatizmanın stabilize olduğunu ve postoperatif altıncı ayda da korneal astigmatizmada ortalama 1,05 D azalma olduğunu bildirmişlerdir.…”

Section: Discussionunclassified

Effect of Limbal Conjunctival Autogreft Treatment on Corneal Astigmatism in Pterygium Patients

Bardak¹,

Eryiğit²

2015

Turkiye Klinikleri J Ophthalmol

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iterjiyum; dejeneratif bulber konjonktivanın korneaya doğru subepitelyal fibrovasküler proliferasyonudur. İnterpalpebral bölgede ve özellikle nazal limbusta bulunan piterjiyum; kapak, baş ve gövdeden oluşmakta-dır. th month mean CVA was 0.78±0.22. The decrease in astigmatism and increase in CVA were both statistically significant. The granulomatous reaction was seen in 1 (3.33%) eye at postoperative 7 th day control. The reoccurrence of pterygium was observed in 1 (3.33%) eye at postoperative 6 th month control. C Co on n--c cl lu us si io on n: : Limbal conjunctival autogreft surgery is safe and effective treatment method in primary pterygium patients.

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Anwendung der Wellenfrontanalyse in Klinik und Wissenschaft

Bühren

Kohnen

2007

Ophthalmologe

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In recent years, wavefront analysis has ceased to be purely a laboratory application and emerged as a method used in ophthalmological diagnosis. This development has been promoted mainly by the widespread use of wavefront-guided LASIK (laser in situ keratomileusis). However, aberrometry is still not a common diagnostic technique, and for many ophthalmologists interpretation of the results is difficult. The second part of this serial paper reviews findings that are relevant for the ophthalmological community and highlights current scientific applications in this area.

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Effects of pterygium on corneal spherical power and astigmatism

Cited by 115 publications

References 12 publications

A review of astigmatism and its possible genesis

A review of astigmatism and its possible genesis

Effect of Limbal Conjunctival Autogreft Treatment on Corneal Astigmatism in Pterygium Patients

Anwendung der Wellenfrontanalyse in Klinik und Wissenschaft

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