Goldmann versus Disposable Applanation Tonometer Tips in Glaucoma Patients and Normal Subjects

• Published in: Current eye research 2016-04, Vol.41 (4), p.521-525
• Main Author: Eldaly, Mohamed A.
• Format: Article
• Language: English
• Subjects: Adult; Aged; Disposable; Disposable Equipment; Equipment Design; Female; Follow-Up Studies; glaucoma; Glaucoma, Open-Angle - diagnosis; Glaucoma, Open-Angle - physiopathology; Goldmann; Humans; Intraocular Pressure; Male; Middle Aged; normal subjects; Prospective Studies; Reproducibility of Results; Tonometry, Ocular - instrumentation
• ISSN: 0271-3683; 1460-2202
• DOI: 10.3109/02713683.2015.1015144

Purpose: To assess agreement of intraocular pressure (IOP) measured with Goldmann applanation and disposable Luneau SA applanation prisms in glaucoma patients compared with normal subjects. Methods: In a prospective comparative study, one eye per primary open-angle glaucoma (POAG) patient was measured for IOP using Goldmann and disposable Luneau SA (Tonojet) applanation tonometry prisms. Glaucoma patients found with IOP < 21 mmHg were compared to an age-matched group of normal subjects. The main outcomes measured were IOP and the difference in IOP between either prism. Bland-Altman plots were used to study the agreement between measurements. Regression analysis was applied to either group. Results: One hundred and four POAG patients (eyes) were enrolled into this study. Seventy-one of them were found with IOPs < 21 mmHg, and were compared to 71 normal subjects (eyes). The mean difference between either prism was almost similar, 2.0 ± 2.0 and 2.1 ± 1.7 mmHg in the glaucoma and normal eye groups, respectively. Bias of two SD from the mean ranged from −1.8 to 5.8 mmHg in glaucoma group and −1.2 to 5.4 mmHg with normal subjects (p