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Topographic Changes After Excision Surgery of Primary Pterygia and the Effect of Pterygium Size on Topograpic Restoration

Nejima, Ryohei M.D.; Masuda, Ayami M.D.; Minami, Keiichiro Ph.D.; Mori, Yosai M.D.; Hasegawa, Yumi M.D.; Miyata, Kazunori M.D. Ph.D.

Erratum

In the article, on page 58 of volume 41, issue 1, the measurement should be “radius” rather than “diameter,” as follows:

Abstract, Methods section, second sentence

Pterygium size was graded according to the advancing edge position: less than one third of corneal radius (grade1), outside the pupil (grade 2), and within the pupillary area (grade 3).”

Methods section of article, second paragraph, first sentence

“Subjects were divided into three groups according to the position of the advancing pterygium edge with respect to corneal radius: extension of the edge to one third of the corneal radius (grade 1), between one third of the corneal radius and the pupil (grade 2), and within the pupillary area (grade 3).”

Eye & Contact Lens. 42(4):224, July 2016.

Eye & Contact Lens: Science & Clinical Practice: January 2015 - Volume 41 - Issue 1 - p 58–63
doi: 10.1097/ICL.0000000000000065
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Erratum

Objective: To assess the effect of pterygium size on time-course change of corneal topography after excision surgery of primary pterygium.

Methods: Retrospective case series included eyes that underwent excisions of primary pterygium. Pterygium size was graded according to the advancing edge position: less than one third of corneal diameter (grade 1), outside the pupil (grade 2), and within the pupillary area (grade 3). Time-course changes in corneal refractive power, astigmatism, and irregularity (surface regularity and asymmetry indices) in corneal topographies over 12 months postoperatively were compared between the pterygium size grades.

Results: Pterygium excision was performed on 562 eyes, consisting of 119, 338, and 105 eyes with grades 1 to 3, respectively. Grade 1 did not change in corneal irregularity, and there was no difference between grades 1 and 2, except for corneal astigmatism at 6 months. Grade 3 showed significantly higher corneal refractive power and irregularity than grade 1 until 3 and 6 months, respectively, whereas corneal astigmatism was higher over 12 months.

Conclusions: Topographic changes after primary pterygium excision were associated with pterygium size. Pterygium advancing over the pupillary area required 6 to 12 months for corneal topography restoration, resulting in slow recovery of visual acuity.

Miyata Eye Hospital, Miyazaki, Japan.

Address correspondence to Ryohei Nejima, M.D., Miyata Eye Hospital, 6-3 Kurahara-cho, Miyakonojo, Miyazaki, 885-0051 Japan; e-mail: nejima@miyata-med.ne.jp

The authors have no funding or conflicts of interest to disclose.

Presented at the ARVO Annual Meeting, Seattle, WA, 2013.

Accepted June 10, 2014

© 2015 Contact Lens Association of Ophthalmologists, Inc.