Ophthalmic Research Group, School of Life and Health Sciences, Aston University, Birmingham, B4 7ET, UK.
Graefes Arch Clin Exp Ophthalmol. 2011 Mar;249(3):449-54. doi: 10.1007/s00417-010-1500-0. Epub 2010 Sep 10.
Evaluation of anterior chamber depth (ACD) can potentially identify those patients at risk of angle-closure glaucoma. We aimed to: compare van Herick's limbal chamber depth (LCDvh) grades with LCDorb grades calculated from the Orbscan anterior chamber angle values; determine Smith's technique ACD and compare to Orbscan ACD; and calculate a constant for Smith's technique using Orbscan ACD.
Eighty participants free from eye disease underwent LCDvh grading, Smith's technique ACD, and Orbscan anterior chamber angle and ACD measurement.
LCDvh overestimated grades by a mean of 0.25 (coefficient of repeatability [CR] 1.59) compared to LCDorb. Smith's technique (constant 1.40 and 1.31) overestimated ACD by a mean of 0.33 mm (CR 0.82) and 0.12 mm (CR 0.79) respectively, compared to Orbscan. Using linear regression, we determined a constant of 1.22 for Smith's slit-length method.
Smith's technique (constant 1.31) provided an ACD that is closer to that found with Orbscan compared to a constant of 1.40 or LCDvh. Our findings also suggest that Smith's technique would produce values closer to that obtained with Orbscan by using a constant of 1.22.
前房深度（ACD）的评估可能有助于识别那些有闭角型青光眼风险的患者。我们旨在：比较 van Herick 的周边前房深度（LCDvh）分级与从 Orbscan 前房角度值计算得出的周边前房深度（LCDorb）分级；确定 Smith 技术的 ACD，并与 Orbscan ACD 进行比较；以及使用 Orbscan ACD 为 Smith 技术计算常数。
80 名无眼部疾病的参与者接受了 LCDvh 分级、Smith 技术 ACD 和 Orbscan 前房角度和 ACD 测量。
与 LCDorb 相比，LCDvh 平均高估了 0.25 级（重复性系数 [CR] 为 1.59）。Smith 技术（常数为 1.40 和 1.31）分别平均高估了 0.33mm（CR 为 0.82）和 0.12mm（CR 为 0.79），与 Orbscan 相比。通过线性回归，我们确定了 Smith 狭缝长度法的常数为 1.22。
与常数 1.40 或 LCDvh 相比，Smith 技术（常数 1.31）提供的 ACD 更接近 Orbscan 发现的 ACD。我们的研究结果还表明，通过使用常数 1.22，Smith 技术将产生更接近 Orbscan 获得的值。
