在越南使用两种生物识别系统在LASIK后的眼睛中IOL功率计算公式.
Tran Ngoc Khanh1,2, Bui Thi Van Anh3, Pham Thi Thu Thuy1
1Department of Ophthalmology, Hanoi Medical University, Hanoi, Vietnam.
概括
精确的眼内镜 (IOL) 功率计算对于LASIK白内障手术后的结果至关重要. 与超声波的IOLMaster 500相比,LenStar 900设备在某些公式中显示出更好的精度.
科学领域:
- 眼科医生 眼科 眼科
- 折射手术是一种折射手术.
- 生物医学工程 生物医学工程
背景情况:
- 白内障手术用眼内透镜 (IOL) 取代阴影的透镜,以恢复视力.
- 精确的IOL功率计算对于实现所需的术后折射结果至关重要.
研究的目的:
- 为了比较各种IOL功率计算公式的预测精度.
- 为了评估这些公式在眼睛之前的LASIK手术.
- 评估两种生物识别设备 (LenStar 900和IOLMaster 500与超声波) 对配方精度的影响.
主要方法:
- 追溯性观察性研究,对29名先前进行LASIK和随后的白内障手术的患者的37只眼睛进行了观察.
- 生物识别数据 (轴长度,角质测量等) 采集使用LenStar 900或IOLMaster 500与超声波.
- 使用Shammas PL,Haigis-L,Barrett TK没有历史,Shammas Cooke和EVO 2.0公式计算的IOL功率.
- 平均绝对误差 (MAE) 在每种配方和设备的手术后3个月评估.
主要成果:
- 对于LenStar 900,MAE范围从0.389 D (巴雷特TK没有病史) 到0.574 D (沙玛斯库克).
- 对于IOLMaster 500 + US,MAE范围从0.423 D (Barrett TK没有病史) 到0.601 D (沙玛斯库克).
- 与IOLMaster 500+美国相比,LenStar 900对Shammas PL,Shammas Cooke和EVO 2.0的MAE显著降低.
结论:
- 在LASIK后的眼睛中,IOL功率预测的准确性取决于所使用的生物识别设备.
- 巴雷特TK (没有病史) 和EVO配方与LenStar 900表现良好.
- 海吉斯-L在两种设备中都表现出一致的准确性,这表明它与非同步生物识别系统的可靠性.
相关概念视频
Chemical Formulas
61.2K
A chemical formula presents information about the proportions of atoms constituting a particular chemical compound or molecule, mainly using symbols of elements and numbers. At times other symbols, such as dashes, parentheses, brackets, commas, plus, and minus signs, are also used. A chemical formula can be one of three types – molecular, empirical, and structural.
61.2K
Experimental Determination of Chemical Formula
47.1K
The elemental makeup of a compound defines its chemical identity, and chemical formulas are the most concise way of representing this elemental makeup. When a compound’s formula is unknown, measuring the mass of its constituent elements is often the first step in determining the formula experimentally.
47.1K
Ionic Compounds: Formulas and Nomenclature
87.3K
An element composed of atoms that readily lose electrons (a metal) can react with an element composed of atoms that readily gain electrons (a nonmetal) to produce ions through complete electron transfer. The compound formed by this transfer is stabilized by the electrostatic attractions (ionic bonds) between the oppositely charged ions.
87.3K
Molecular Compounds: Formulas and Nomenclature
55.8K
Molecular compounds or covalent compounds result when atoms share electrons to form covalent bonds. Since there is no electron transfer, molecular compounds do not contain ions; instead, they consist of discrete, neutral molecules.
55.8K
Calculating Equilibrium Concentrations
53.4K
Being able to calculate equilibrium concentrations is essential to many areas of science and technology—for example, in the formulation and dosing of pharmaceutical products. After a drug is ingested or injected, it is typically involved in several chemical equilibria that affect its ultimate concentration in the body system of interest. Knowledge of the quantitative aspects of these equilibria is required to compute a dosage amount that will solicit the desired therapeutic effect.
A more...
A more...
53.4K
Formula Mass and Mole Concepts of Compounds
81.3K
Formula Mass of Covalent Compounds
81.3K


