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Pterygium can significantly affect corneal refractive status

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Pterygium can induce significant changes in the cornea's refractive status, with the effect increasing as the grade of pterygia increases, according to a study by a researcher in India.

Sejal Maheshwari, MD, investigated the effect of primary pterygia on the corneal topography of 151 eyes. All of the patients underwent videokeratography preoperatively and at 1 month after pterygium excision involving conjunctival autograft transplantation, according to the study.

Dr. Maheshwari found that corneal astigmatism, surface regularity index and surface asymmetry index all increased with the grade of pterygium. However, all topographic parameters significantly improved after surgery. Specifically, corneal astigmatism decreased from 4.4 D preoperatively to 1.55 D at 1 month follow-up (P < .001), according to the study.

Additionally, the corneal surface regularity had improved and corneal asymmetry had reduced at 1 month postop, Dr. Maheshwari noted.

The study is published in the September-October issue of Indian Journal of Ophthalmology.