结论:在原发性开角型青光眼患者中可观察到毛果芸香碱治疗后房水流出途径结构的反应降低,这可能有助于理解青光眼的眼压评估。
目的:为了评估小梁网(TM)的形态变化,施莱姆运河(SC),巩膜骨刺(SS),原发性开角型青光眼(POAG)患者和健康个体瞳孔缩小后的睫状肌。
方法:纳入30例POAG患者和26例健康对照者。所有参与者都接受了完整的眼科检查,包括眼内压(IOP)和扫频源光学相干断层扫描(SS-OCT),在局部施用毛果芸香碱之前和之后1小时(2%)。OCT测量包括TM厚度和宽度,SC直径和面积,SS长度,睫状肌厚度(CMT),和睫状肌角度(CMA)。
结果:毛果芸香碱给药引起眼压下降(15.6±2.3至14.6±2.2mmHg),鼻SS长度减少(196.31±47.75至171.52±33.93μm),TM厚度减少(90.18±16.43至83.02±13.74μm),在健康对照组中,SC直径(134.84±32.28至162.08±48.67μm)和SC面积(3851.37±1455.07至4801.39±1762.37μm2)增加。相比之下,POAG患者的IOP和OCT测量值无显著变化.在基线,正常眼CMA与眼压独立相关。瞳孔缩小后,正常眼的TM厚度变化与眼压变化独立相关;在POAG眼中,SS长度和CMA的变化与IOP的变化独立相关。
结论:外用毛果芸香碱诱导健康个体流出途径结构的形态学改变,而POAG无显著变化。在青光眼患者中观察到的较低反应可能与了解IOP变化有关。
Lower response of aqueous outflow pathway structures after pilocarpine could be observed in primary open angle glaucoma (POAG) patients, which is likely to be helpful for understanding intraocular pressure (IOP) evaluation in glaucoma.
To evaluate the morphologic changes in the trabecular meshwork (TM), Schlemm canal (SC), scleral spur (SS), and ciliary muscle after
miosis in patients with POAG and healthy individuals.
A total of 30 patients with POAG and 26 healthy controls were recruited. All participants underwent complete ophthalmologic examinations, including IOP and swept-source optical coherence tomography (OCT), before and 1 hour after the local administration of pilocarpine (2%). OCT measurements included TM thickness and width, SC diameter and area, SS length, ciliary muscle thickness, and ciliary muscle angle (CMA).
Pilocarpine administration induced a decline in IOP (15.6±2.3-14.6±2.2 mm Hg), decrease in nasal SS length (196.31±47.75-171.52±33.93 μm), decrease in TM thickness (90.18±16.43-83.02±13.74 μm), and increase in SC diameter (134.84±32.28-162.08±48.67 μm) and SC area (3851.37±1455.07-4801.39±1762.37 μm 2 ) among healthy controls. In contrast, no significant changes in IOP and OCT measurements were found in patients with POAG. At baseline, CMA was independently correlated with IOP in normal eyes. After
miosis, the change in TM thickness was independently correlated with changes in IOP in normal eyes; in eyes with POAG, changes in SS length and CMA were independently associated with changes in IOP.
Topical pilocarpine-induced morphologic changes to outflow pathway structures in healthy individuals without significant changes in POAG. The lower response observed in patients with glaucoma may be relevant to understanding IOP changes.