Domínguez-Vicent Alberto, Monsálvez-Romín Daniel, Albarrán-Diego César, Sanchis-Jurado Vicent, Montés-Micó Robert
Optometry Research Group, Department of Optics, University of Valencia, Spain.
Arq Bras Oftalmol. 2014 Aug;77(4):243-9. doi: 10.5935/0004-2749.20140062.
To study the changes in anterior chamber depth (ACD), anterior chamber angle (ACA), and pupil diameter (PD) during accommodation.
Eighty eyes of 80 subjects, aged 22 to 40 years, were included. The rotating Dual Scheimpflug and a Placido disc system (Galilei G4, Ziemer Ophthalmic Systems AG, Switzerland) was used to measure the changes in ACD, ACA, and PD during accommodation. ACD measurement was taken for the central zone and for 4 more positions, each in different orientation (nasal, superior, temporal and inferior), 4 mm away from the centre. ACA was measured for the whole eye as well for the nasal, superior, temporal, and inferior quadrants. These metrics were obtained for various accommodation stimuli, ranging from +1 D to -4 D in 1-D steps.
For a given position, the ACD did not vary significantly with accommodation. For the central ACD, the percentage of relative change between far and near vision was -4.11%. The ACA was significantly lower at the inferior, temporal, and superior positions. There was no change in the ACA of the whole eye and that of the nasal orientation. These two eye metrics were significantly lower in the superior-nasal than in the inferior-temporal region. At each vergence studied, the PD decreased significantly with accommodation. The relative change after the -4 D stimulus was -8.13%.
ACA and PD varied significantly with accommodation, whereas no such variation of ACD was observed. Further, the anterior chamber was found to be asymmetrical, with the nasal-superior area becoming significantly shallower than the inferior temporal region.
研究调节过程中前房深度（ACD）、前房角（ACA）和瞳孔直径（PD）的变化。
纳入80名年龄在22至40岁之间的受试者的80只眼睛。使用旋转双Scheimpflug和Placido盘系统（Galilei G4，瑞士齐默眼科系统公司）测量调节过程中ACD、ACA和PD的变化。在中央区域以及距中心4毫米的不同方向（鼻侧、上方、颞侧和下方）的另外4个位置进行ACD测量。对全眼以及鼻侧、上方、颞侧和下方象限进行ACA测量。这些指标是在从+1 D到-4 D以1 D步长变化的各种调节刺激下获得的。
对于给定位置，ACD在调节过程中无显著变化。对于中央ACD，远视力和近视力之间的相对变化百分比为-4.11%。下方、颞侧和上方位置的ACA显著降低。全眼和鼻侧方向的ACA没有变化。这两个眼部指标在鼻上象限显著低于颞下象限。在每个研究的聚散度下，PD随调节显著降低。-4 D刺激后的相对变化为-8.13%。
ACA和PD随调节有显著变化，而未观察到ACD有此类变化。此外，发现前房不对称，鼻上区域比颞下区域明显变浅。
