Department of Ophthalmology, University of Miami Miller School of Medicine, Bascom Palmer Eye Institute, Miami, FL, USA.
Department of Mathematics, University of Miami, Miami, FL, USA.
Transl Vis Sci Technol. 2021 Apr 1;10(4):13. doi: 10.1167/tvst.10.4.13.
The purpose of this study was to determine if it is possible for the macula to remain attached if a bullous retinal detachment blocks the examiner's view to the macula.
A mathematical analysis compared the arc length of the attached retina versus the length of a detached retina necessary to obscure the macula (hang over the visual axis). The shape (oblate ellipsoid) and dimensions of the retina were based on a published study. The complete path of the hanging retina was calculated as a static catenary so as to depict the lowest possible position ("worst case scenario").
The measured and calculated angle between the fovea and ora serrata was 105 degrees. When considering a catenary shape of the hanging retina, the macula could, mathematically, still be attached despite the retina hanging down 1.03 mm below the visual axis for an emmetropic eye. The maximal distance calculated was 1.095 mm for a -12 diopter (D) myopic eye.
If the macular center cannot be viewed due to a bullous superior retinal detachment hanging into the examiner's view, it is unlikely but possible that the macula remains attached. If the view is obscured by at least 1 mm below the fovea, it is not mathematically possible for the fovea to be attached.
The status of the macula being detached is subject to mathematical constraints, which, explored herein, offer a higher certainty of clinical decision making that could inform management for better clinical results.
本研究旨在确定当大疱性视网膜脱离阻挡检查者观察黄斑时，黄斑是否能够保持附着。
通过数学分析，比较了附着的视网膜弧长与需要遮挡黄斑（悬垂于视轴上方）的脱离视网膜长度。根据已发表的研究，视网膜的形状（扁长椭球体）和尺寸被确定。悬挂的视网膜的完整路径被计算为静态悬链线，以描绘出最低的可能位置（“最坏情况场景”）。
测量和计算的黄斑中心凹与锯齿缘之间的夹角为 105 度。考虑到悬挂的视网膜的悬链线形状，即使在正视眼的视网膜悬垂在视轴下方 1.03 毫米的情况下，黄斑在数学上仍可能保持附着。对于-12 屈光度（D）近视眼，计算出的最大距离为 1.095 毫米。
如果由于大疱性上方视网膜脱离悬垂进入检查者的视野而无法观察黄斑中心，那么黄斑保持附着的可能性虽然较小，但仍有可能。如果视野被遮挡至少 1 毫米低于黄斑中心，那么黄斑附着在视网膜上在数学上是不可能的。
这段英文原文专业性较强，涉及医学领域的专业词汇和术语，如“bullous retinal detachment”（大疱性视网膜脱离）、“macula”（黄斑）等。因此，在翻译时，需要准确理解这些词汇的含义，并使用专业的医学术语进行翻译。
原文中的一些句子结构较为复杂，需要进行适当的调整和简化，以确保译文流畅易懂。例如，“The complete path of the hanging retina was calculated as a static catenary so as to depict the lowest possible position (‘worst case scenario’)”可以翻译为“悬挂的视网膜的完整路径被计算为静态悬链线，以描绘出最低的可能位置（‘最坏情况场景’）”。
原文中的一些标点符号和缩写也需要进行适当的处理。例如，“D”在句中代表“Diopter”（屈光度），需要将其翻译为“度”。
