PURPOSE To investigate agreement in intraocular pressure (IOP) measurements among Icare rebound tonometry, Tonopen tonometry, and Goldmann applanation tonometry following vitreoretinal surgery. DESIGN Reliability analysis of tonometers. METHODS Fifty-eyes of 50 adults undergoing vitreoretinal surgery were enrolled. IOP was measured on first postoperative day using Icare (Tiolat, Helsinki, F...

OBJECTIVE To compare the dependence of dynamic contour tonometry (DCT) and Goldmann applanation tonometry (GAT) on central corneal thickness (CCT) in primary open-angle glaucoma. METHODS In a prospective study, the interocular (right vs left eye) difference in intraocular pressure measured by DCT and GAT was compared with the interocular CCT difference in 125 patients with primary open-angle ...

There is a large literature on the subject of the water-drinking test. Many authors have evaluated it and considered it to be a reliable method ofdiagnosing chronic simple glaucoma (Agarwal and Sharma, I953; Bloomfield and Kellerman, I947; Norskov, i967; Scheie, Spencer, and Helmick, 1956; Swanljung and Blodi, 1956). Leydhecker (I95oa, b, 1954) found the test unreliable with Schiotz tonometry. ...

PURPOSE To compare intraocular pressure (IOP) measurements, taken using Perkins applanation tonometry (PAT) and Goldmann applanation tonometry (GAT). METHODS 100 eyes of 100 patients underwent Perkins and Goldmann applanation tonometry, with a randomized order of modality, performed by a masked observer. The right eye was measured, for all subjects, and the data used in statistical analysis. ...

PURPOSE To determine the long-term repeatability of diurnal intraocular pressure (IOP) patterns in healthy Asian subjects without glaucoma. METHODS Twenty-three eyes in 23 healthy Asian subjects without glaucoma underwent diurnal IOP measurements using Goldmann applanation tonometry every 2 hours from 9 AM to 11 PM during two visits that were 8 weeks apart. To validate repeatability between v...

The digital volume pulse can be recorded simply and noninvasively by photoplethysmography. The objective of the present study was to determine whether a generalized transfer function can be used to relate the digital volume pulse to the peripheral pressure pulse and, hence, to determine whether both volume and pressure pulse waveforms are influenced by the same mechanism. The digital volume pul...

Increased arterial stiffness is associated with higher levels of aortic wave reflection and aortic blood pressure. Recent evidence suggests a link between muscle sympathetic nerve activity and indices of arterial stiffness. Therefore, the aims of this study were to examine the relationship between resting muscle sympathetic nerve activity and characteristics of aortic pressure wave reflection a...

Aim : The aim of this study is to validate the efficacy of NCT by comparing its measurements with that of Goldmann’s applanation tonometry and to know if it can be used as a screening tool for glaucoma. Materials and methods : In 400 eyes of 200 adults selected for cataract surgery, IOP was measured first with NCT and 15min later with GAT and the results were compared. Results : The range of IO...

The study of hemodynamic physiology utilizing traditional methods presents many challenges and limitations to educators. The goal of the educator is to provide the student with an adequate understanding of the basic hemodynamic anatomy and physiology governing blood flow, cardiac cycle and associated Korotkoff sounds, and the pathophysiology of vessel-related diseases. Several teachable moments...