Antonov A A, Vostrukhin S V, Volzhanin A V, Vitkov A A
Krasnov Research Institute of Eye Diseases, Moscow, Russia.
OOO MedSef, Moscow Region, Russia.
Vestn Oftalmol. 2023;139(2):28-34. doi: 10.17116/oftalma202313902128.
This study analyzes the fluctuations of intraocular pressure (IOP) and clarifies the error of paracentral rebound tonometry associated with change in body position.
The study included 45 healthy volunteers aged 25.4±2.1 years. First we performed rebound tonometry in the sitting position in the center of the cornea and 3-4 mm from the temporal and nasal sides (Icare-, Icare-, Icare-, respectively) and bidirectional applanation tonometry (IOPcc - corneal compensated, IOPg - Goldmann tonometry). Then we measured Icare-, Icare-, Icare- in the supine position, and after 5 minutes repeated Icare- in the supine position. After this, we measured Icare- IOPcc and IOPg in the sitting position.
Initial IOPcc and IOPg were 4.6±2.8 and 14.8±2.8 mm Hg. Initial Icare-, Icare-, and Icare- measurements amounted to 15.0±1.9, 15.7±1.5 and 16.3±1.3 mm Hg; in the supine position the measurements were 16.4±2.1, 17.2±1.7 and 17.1±1.9 mm Hg. Paracentral measurements differed from Icare- in both sitting and supine positions; only between Icare- and Icare- measured in the supine position there were no significant differences. The results of Icare-, Icare-, and Icare- in body position change were comparable. Icare- measured after 5 minutes in the supine position increased up to 16.6±2.4 mm Hg. Final IOPcc and IOPg did not differ from the initial measurements. Final Icare- was lower than the initial result by 0.8±0.2 mm Hg, and lower than both supine Icare- measurements by 2.1±0.2 and 2.6±0.2 mm Hg.
Paracentral rebound tonometry findings exceed those of rebound tonometry in central cornea, but in body position change the alteration of measurements in the same points on the cornea are comparable. In the supine position IOP increases on average by 1.0-1.5 mm Hg compared to the sitting position.
本研究分析眼压（IOP）的波动情况，并阐明与体位变化相关的角膜旁中央回弹眼压测量法的误差。
本研究纳入了45名年龄在25.4±2.1岁的健康志愿者。首先，我们在坐位时于角膜中央以及距颞侧和鼻侧3 - 4毫米处（分别为Icare -、Icare -、Icare -）进行回弹眼压测量，并进行双向压平眼压测量（IOPcc - 角膜补偿眼压，IOPg - 戈德曼眼压测量法）。然后，我们在仰卧位测量Icare -、Icare -、Icare -，5分钟后在仰卧位重复测量Icare -。在此之后，我们在坐位测量Icare -、IOPcc和IOPg。
初始IOPcc和IOPg分别为4.6±2.8和14.8±2.8毫米汞柱。初始Icare -、Icare -和Icare -测量值分别为15.0±1.9、15.7±1.5和16.3±1.3毫米汞柱；在仰卧位时测量值分别为16.4±2.1、17.2±1.7和17.1±1.9毫米汞柱。角膜旁中央测量值在坐位和仰卧位时均与Icare -不同；仅仰卧位时Icare -和Icare -测量值之间无显著差异。Icare -、Icare -和Icare -在体位变化时的结果具有可比性。仰卧位5分钟后测量的Icare -升高至16.6±2.4毫米汞柱。最终IOPcc和IOPg与初始测量值无差异。最终Icare -比初始结果低0.8±0.2毫米汞柱，比仰卧位时的两个Icare -测量值分别低2.1±0.2和2.6±0.2毫米汞柱。
角膜旁中央回弹眼压测量结果高于角膜中央回弹眼压测量结果，但在体位变化时，角膜上同一点测量值的变化具有可比性。与坐位相比，仰卧位时眼压平均升高1.0 - 1.5毫米汞柱。
