Document Type
Original Article
Abstract
Background: Conjunctival tissue encroaches triangularly into the cornea to form pterygium. In a progressive pterygium, it may be red, thick, and fleshy, while in an atrophic pterygium, it may be pale, thin, and membranous. The precision of the estimated intraocular lens (IOL) power can be affected by significant corneal astigmatism brought on by a big pterygium.
Objective: To detect the relationship between pterygium size and its impact on IOL power calculation. That is for accurate calculation of IOL power before cataract surgery.
Patients and Methods: A prospective, non-randomized controlled clinical trail was performed at the ophthalmology department of Al-Zahraa University Hospital, Al-Azhar University from January 2022 to July 2022. The AL-Azhar University Faculty of Medicine for Girls' ethical committee approved this study.
Results: There was a significant correlation found between the length (p value of
Pearson correlation analysis showed highly strong relationships between the length, width and CPTA% of the pterygium and the IOL power change(preop–postop) in all formulas(p-value
Conclusion: If simultaneous surgery is being planned for eyes with pterygia that are 2.5 to 4.0 mm in length, 5.5 to 8.0 mm2 in area, and less than 4 mm in width, the implanted IOL power should be at least 0.50 D lower than the expected IOL power.
Keywords
Pterygium; IOL power calculation; pterygium induce astigmatism; Corneo-pterygium total area.
Subject Area
Ophthalmology
How to Cite This Article
El-Hameed, Sara Salah Mohamed Abd; Lamie, Nashwa Mohamed; and El-Deen, Asmaa Mohammed Gamal
(2023)
"Relationship between Pterygium Size and Accuracy of Intraocular Lens Power Calculation,"
Al-Azhar International Medical Journal: Vol. 4:
Iss.
7, Article 9.
DOI: https://doi.org/10.58675/2682-339X.1878
