Analysis of pterygium size and induced corneal astigmatism

Cornea
Payman A-K Mohammad-Salih, Ahmad Fauzi M D Sharif

Abstract

To study the relationship between pterygium size (extension, width, total area) and corneal astigmatism in eyes with unilateral primary pterygium. Also to determine the critical size for surgery before the occurrence of a significant corneal astigmatism. This study was conducted on 77 eyes of 77 patients with unilateral primary pterygium. The extension and width were measured and the total area was calculated. Automated keratometry was used to determine corneal astigmatism. Pterygium extension ranged from 0.25 to 6.50 mm (mean, 2.0 +/- 1.2 mm), width ranged from 1.50 to 10.0 mm (mean, 4.19 +/- 1.5 mm), and total area ranged from 0.3 to 24.3 mm(2) (mean, 5.0 +/- 4.8 mm(2)). The mean value of corneal astigmatism was significantly (P < 0.0001) higher in pterygium-affected eyes (1.2 +/- 0.9 D) than control eyes (0.6 +/- 0.5 D). With-the-rule was the main type of pterygium-induced astigmatism (49.4%), followed by against-the-rule (36.4%) and oblique (14.3%). Pterygium extension had the best correlation (Pearson correlation coefficient r = 0.462, P < 0.001), followed by total area (r = 0.447, P < 0.002) and width (r = 0.348, P < 0.002). A stronger correlation was noted between pterygium size and the difference in corneal astigmatism ...Continue Reading

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Citations

Mar 22, 2013·Indian Journal of Ophthalmology·Rana Altan-YayciogluYonca A Akova
Dec 12, 2013·Cornea·Sun Woong KimEung Kweon Kim
Jun 6, 2014·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Pere PujolTomàs Martí-Huguet
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May 3, 2018·Journal of Ophthalmic & Vision Research·Ahmed Mohamed RedaSomaia Ahmad Saad El-Din
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Jun 10, 2021·Therapeutic Advances in Ophthalmology·Toktam ShahrakiSepehr Feizi
Jul 23, 2021·Therapeutic Advances in Ophthalmology·Emine DoğanGürsoy Alagöz
Nov 14, 2021·Irish Journal of Medical Science·Emine DoganGürsoy Alagöz
Oct 27, 2021·Current Opinion in Ophthalmology·Xu HeBennie H Jeng

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