Shum P J, Ko L S, Ng C L, Lin S L
Department of Ophthalmology, Cathay General Hospital, Taipei, Taiwan, Republic of China.
Am J Ophthalmol. 1993 Jan;115(1):76-81. doi: 10.1016/s0002-9394(14)73528-7.
We performed a biometric study that used A-mode ultrasonography on 106 subjects during ocular accommodation. The subjects were divided into two groups; group 1 included 76 subjects and group 2 included 30 subjects. In group 1, we measured the anterior chamber depth, lens thickness, and axial length in the right eye while the left eye, wearing corrective spectacles, focused at distances of 6 m, 33 cm, and 33 cm with an additional correction of +3.0 diopters to offset any accommodative effect. In group 2, we measured the anterior chamber depth, lens thickness, and axial length in the right eye while the left eye focused at distances of 6 m, 33 cm, and 12.5 cm. Similar to the left eyes in group 1, the left eyes in group 2 wore corrective spectacles during all procedures. During accommodation, decreased anterior chamber depth and thickening of the lens were noted in all cases. In group 1, axial length significantly increased an average of 0.06 +/- 0.01 mm (P < .0005) while the left eye focused at a distance of 33 cm. There were no significant changes with the additional +3.0 diopters (P < .05). In group 2, axial length significantly increased an average of 0.05 +/- 0.01 mm (P < .0005) when the left eye focused at a distance of 33 cm, and there was further significant elongation of 0.05 +/- 0.01 mm when the left eye focused at a distance of 12.5 cm. Collectively, these results suggest that axial length increases along with changes in the lens and anterior chamber depth during ocular accommodation.
我们进行了一项生物测量研究，在106名受试者眼部调节期间使用A型超声检查。受试者分为两组；第1组包括76名受试者，第2组包括30名受试者。在第1组中，我们测量了右眼的前房深度、晶状体厚度和眼轴长度，同时左眼戴着矫正眼镜，分别聚焦于6米、33厘米和33厘米的距离，并额外矫正+3.0屈光度以抵消任何调节效应。在第2组中，我们测量了右眼的前房深度、晶状体厚度和眼轴长度，同时左眼分别聚焦于6米、33厘米和12.5厘米的距离。与第1组的左眼一样，第2组的左眼在所有检查过程中都戴着矫正眼镜。在调节过程中，所有病例均观察到前房深度减小和晶状体增厚。在第1组中，当左眼聚焦于33厘米的距离时，眼轴长度平均显著增加0.06±0.01毫米（P<.0005）。额外增加+3.0屈光度时无显著变化（P<.05）。在第2组中，当左眼聚焦于33厘米的距离时，眼轴长度平均显著增加0.05±0.01毫米（P<.0005），当左眼聚焦于12.5厘米的距离时，眼轴长度进一步显著延长0.05±0.01毫米。总体而言，这些结果表明，在眼部调节过程中，眼轴长度随着晶状体和前房深度的变化而增加。
