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Hiroto Obata, Yusuke Arai, Shinji Makino; Incidence and Clinical Characteristics of Stocker's Line in Patients with Pterygium. Invest. Ophthalmol. Vis. Sci. 2016;57(12):3491.
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© ARVO (1962-2015); The Authors (2016-present)
Stocker’s line is a brownish iron deposition which may be seen at the advancing edge of the pterygium. There remain still largely unknowns including the mechanism of iron deposition and the incidence of Stocker’s line. We report our investigation regarding the incidence and clinical characteristics of Stocker's line in patients with pterygium,
Two hundred and ninety-two eyes of 231 patients with primary nasal pterygium (130 eyes of 101 males, 162 eyes of 130 females, mean age 63.0±11.9) who were able to take a slit lamp photograph before the surgery were analyzed in this study. The size of the pterygium was classified into 3 groups, small, medium, and large size, depending on the distance between the center of the cornea and the limbus equally divided into three on the picture. Incidence of Stocker's line, sex differences, relations with age and size of pterygium were investigated retrospectively.
Stocker’s line was seen in 43 eyes of 41 cases (14.7%) among all cases. It was seen 15 eyes (11.5%) in males and 28 eyes (17.3%) in females, and there were no sex differences. The incidences grouped by decade were 0% under 50s, 15.9% in 50s, 18.4% in 60s, 15.7% in 70s, and 15.0% over 80s, and no relation between the incidence and age was found. The incidences separated by size were 1 eye (1.4%) out of 69 eyes in small, 22 eyes (15.2%) of 145 eyes in medium, and 20 eyes (25.6%) of 78 eyes in large, resulting in a high incidence of a larger pterygium.
Stocker’s line is hardly observed in a small pterygium. The occurrence of Stocker’s line may be related to the duration from the onset of the pterygium.
This is an abstract that was submitted for the 2016 ARVO Annual Meeting, held in Seattle, Wash., May 1-5, 2016.
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