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Yasuki Ito, Akiko Takahashi, Hiroko Terasaski; Peripapillary Crescent and Related Factors in Highly Myopic Normal Eyes. Invest. Ophthalmol. Vis. Sci. 2012;53(14):2660.
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To investigate the relationships between the peripapillary crescent and different ocular parameters in normal highly myopic eyes. Also, to determine whether the area of the peripapillary crescent enlarged significantly during a one-year period and to investigate the related parameters.
The medical records of the 49 normal highly myopic eyes whose fellow eyes had myopic complications patients were reviewed. The area of the peripapillary crescent and other ocular parameters, such as choroidal and retinal thickness at the fovea, height of a posterior staphyloma, length of the retinal pigment epithelium (RPE) and axial length were measured before and after about one year. The changes in the area of the peripapillary crescent and the associations with these ocular parameters during their natural course were determined.
The area of the peripapillary crescent was significantly associated with the choroidal thickness, axial length, posterior staphyloma height, and foveal thickness. The area of the peripapillary crescent were significantly increased during the one-year interval. Stepwise regression analyses found that the factors most highly associated with the area of the peripapillary crescent were the choroidal thickness and the absolute nasal staphyloma height. The factor most highly associated with the increase in peripapillary crescent area was the increase in axial length.
Observing the size of the peripapillary crescent may be helpful in evaluating choroidal thickness and posterior staphyloma. In addition, Observing the changes in the size of the peripapillary crescent may be helpful in evaluating the changes in the axial length, the posterior staphyloma, and choroidal thickness.
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