Shotaro Asano1, Ryo Asaoka1, Takehiro Yamashita2, Shuichiro Aoki1,3, Masato Matsuura1,4, Yuri Fujino1,4, Hiroshi Murata1, Shunsuke Nakakura5, Yoshitaka Nakao6, Yoshiaki Kiuchi6. 1. Department of Ophthalmology, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, Tokyo, Japan. 2. Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan. 3. Department of Ophthalmology, Sapporo City General Hospital, Hokkaido, Japan. 4. Department of Ophthalmology, Graduate School of Medical Sciences, Kitasato University, Kanagawa, Japan. 5. Department of Ophthalmology, Saneikai Tsukazaki Hospital, Hyogo, Japan. 6. Department of Ophthalmology and Visual Science, Hiroshima University, Hiroshima, Japan.
Abstract
PURPOSE: We previously reported that the retinal deformation due to myopia was represented by the peripapillary retinal arteries angle (PRAA). In this study, we investigated the relationship between the PRAA and biomechanical properties measured with Corvis ST (CST) tonometry. METHODS: Thirty-four normative eyes of 34 subjects who underwent CST measurement were enrolled. The PRAA was calculated from a fundus photograph. Variables related to the PRAA were identified from age, axial length, spherical equivalent refractive error, and 10 CST parameters using model selection with the second-order bias-corrected Akaike information criterion index. RESULTS: The PRAA was best described with axial length (coefficient = -5.66, P < 0.0001), maximum deflection amplitude (mm; coefficient = 130.5, P = 0.0004), and deflection amplitude ratio (DA ratio) 2 mm (coefficient = -25.8, P = 0.0032), where mm was the amount of the maximum corneal apex movement and DA ratio 2 mm was the ratio between the deformation amplitudes at the apex and 2 mm away from the apex. The optimal model was significantly better than the model only with axial length (P = 0.0014, analysis of variance). CONCLUSIONS: The PRAA was significantly better described with the CST parameters compared to the axial length model only; eyes with small PRAA (larger myopic retinal deformation) showed narrow and shallow maximum corneal deflection. TRANSLATIONAL RELEVANCE: The Corvis ST parameters, which represents corneal biomechanical characteristics, were associated with myopic retinal deformation.
PURPOSE: We previously reported that the retinal deformation due to myopia was represented by the peripapillary retinal arteries angle (PRAA). In this study, we investigated the relationship between the PRAA and biomechanical properties measured with Corvis ST (CST) tonometry. METHODS: Thirty-four normative eyes of 34 subjects who underwent CST measurement were enrolled. The PRAA was calculated from a fundus photograph. Variables related to the PRAA were identified from age, axial length, spherical equivalent refractive error, and 10 CST parameters using model selection with the second-order bias-corrected Akaike information criterion index. RESULTS: The PRAA was best described with axial length (coefficient = -5.66, P < 0.0001), maximum deflection amplitude (mm; coefficient = 130.5, P = 0.0004), and deflection amplitude ratio (DA ratio) 2 mm (coefficient = -25.8, P = 0.0032), where mm was the amount of the maximum corneal apex movement and DA ratio 2 mm was the ratio between the deformation amplitudes at the apex and 2 mm away from the apex. The optimal model was significantly better than the model only with axial length (P = 0.0014, analysis of variance). CONCLUSIONS: The PRAA was significantly better described with the CST parameters compared to the axial length model only; eyes with small PRAA (larger myopic retinal deformation) showed narrow and shallow maximum corneal deflection. TRANSLATIONAL RELEVANCE: The Corvis ST parameters, which represents corneal biomechanical characteristics, were associated with myopic retinal deformation.