Vermeulen Louise, Koppen Carina, Van Os Luc, Pierscionek Barbara K, Rozema Jos J
Department of Ophthalmology, Antwerp University Hospital, Edegem, Belgium.
Department of Ophthalmology, Antwerp University Hospital, Edegem, Belgium; Visual Optics Lab Antwerp (VOLANTIS), Faculty of Medicine and Health Sciences, Antwerp University, Wilrijk, Belgium.
J Optom. 2025 Jan-Mar;18(1):100528. doi: 10.1016/j.optom.2024.100528. Epub 2025 Jan 8.
The maximum accommodative range is a useful indication of visual function. It decreases with age, but the exact cause of this decrease is not fully understood. It is associated with the increasing rigidity of the lens and changes to the lens shape, as well as the geometry of the zonular attachments. This work aims to determine the relationship between the accommodative range and lens shape in a group of healthy young adults.
This study includes 40 emmetropic participants between 20 and 30 years of age. They filled in a questionnaire and underwent accommodation measurements using the RAF Convergence Rule and the Negative Lens Test. After a drop of Tropicamide 0.5 % and Cyclopentolate 1 %, participants underwent measurements with autorefractor, Scheimpflug tomography (Pentacam HR, Oculus), anterior segment Optical Coherence Tomography and optical biometry.
The accommodative range did not correlate significantly (p>0.05) with any of the lenticular or ocular parameters considered, such as lens thickness, lens radii of curvature, axial length, or corneal power.
The crystalline lens shape does not affect the accommodative range of the eye. This may be due to the smaller deformation required to bring a thicker lens to the same level of accommodation as a thinner lens. The amount of force on the zonular fibres may therefore be similar, in all lenses, regardless of the lens shape.
最大调节范围是视觉功能的一个有用指标。它会随着年龄增长而下降，但这种下降的确切原因尚未完全明确。这与晶状体硬度增加、晶状体形状改变以及悬韧带附着的几何结构变化有关。这项研究旨在确定一组健康年轻成年人的调节范围与晶状体形状之间的关系。
本研究纳入了40名年龄在20至30岁之间的正视眼参与者。他们填写了一份问卷，并使用RAF集合规则和负透镜试验进行调节测量。在滴入0.5%的托吡卡胺和1%的环喷托酯后，参与者接受了自动验光仪、Scheimpflug断层扫描（Pentacam HR，Oculus）、眼前节光学相干断层扫描和光学生物测量。
调节范围与所考虑的任何晶状体或眼部参数，如晶状体厚度、晶状体曲率半径、眼轴长度或角膜屈光度，均无显著相关性（p>0.05）。
晶状体形状不影响眼睛的调节范围。这可能是因为使较厚晶状体达到与较薄晶状体相同调节水平所需的变形较小。因此，无论晶状体形状如何，所有晶状体上悬韧带纤维的受力大小可能相似。
