Static and dynamic analysis of the anterior segment with optical coherence tomography
Static and dynamic analysis of the anterior segment with optical coherence tomography
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DOI：
10.1016/j.jcrs.2004.05.024
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发表时间：
2004-09-01
影响因子：
2.8
通讯作者：
Ferraz, C
中科院分区：
文献类型：
--
作者：
Baikoff, G;Lutun, E;Ferraz, C
目的：研究眼前段生物测量学改变与调节能力和年龄的关系，并确定其在眼前段手术领域的可能应用，特别是屈光晶体植入术。Clinique Monticelli，法国马赛。该研究包括7岁至82岁的受试者，他们使用1310 nm波长光学相干断层扫描(OCT)对前房生物测量进行评估。该设备有一个固定目标，可以用负片对焦和散焦，以刺激自然调节。所有测量均由同一操作员执行。结果：56例104眼，屈光度为+5.0~-5.0D，分别与屈光不正、年龄、调节后的屈光度进行比较。静息状态下，平均前房直径12.334 mm，平均前房直径3.106 mm，平均瞳孔直径4.258 mm。在调节1.0D的情况下，前极平均前移30 km，曲率半径减小0.3 mm，瞳孔直径减小0.15 mm。结论：AC OCT是一种简便的眼前段评估和AC(角膜、虹膜、晶状体和虹膜角膜角度)检查仪器。1310 nm的光波长被色素阻挡，阻止了虹膜后面的检查。然而，AC OCT能够很好地显示眼前段的解剖关系，甚至在不透明的角膜后面也是如此。(C)2004年ASCR和ESCR。
Purpose: To study biometric modifications of the anterior segment with accommodation and age and determine possible applications in areas of anterior segment surgery, particularly implantation of refractive lenses.Setting. Clinique Monticelli, Marseille, France.Method. The study comprised subjects between 7 years of age and 82 years of age in whom anterior chamber biometry was evaluated using 1310 nm wavelength optical coherence tomography (OCT). The equipment has a fixation target that can be focused and defocused with negative lenses to stimulate natural accommodation. All measurements were performed by the same operator. The horizontal diameter of the AC, the anterior chamber depth (ACD), the horizontal pupil diameter, and the horizontal radius of curvature of the crystalline lens' anterior pole were measured in the unaccommodated state and after stimulating accommodation.Results: Fifty-six subjects (104 eyes) were included; the refractions ranged from +5.0 diopters (D) to -5.0 D. The static and dynamic measurements were compared with ametropia, age, and accommodation. At rest, the mean AC diameter was 12.334 mm, the mean ACD was 3.106 mm, and the mean pupil diameter was 4.258 mm. With 1.0 D of accommodation, the anterior pole moved forward by a mean of 30 Km, the radius of curvature decreased 0.3 mm, and the pupil diameter decreased 0.15 mm.Conclusions: The AC OCT is a user-friendly instrument for evaluating the anterior segment and examining the AC (cornea, iris, crystalline lens, and iridocorneal angle). The 1310 nm light wavelength is blocked by pigments, preventing examination behind the iris. However, the AC OCT is capable of good image quality and visualization of the anatomical relationships in the anterior segment, even behind an opaque cornea.(C) 2004 ASCRS and ESCRS.