Abstract
BackgroundTo evaluate the influence of automated visual field (VF) testing on intraocular pressure (IOP) in patients with ocular hypertension (OHT) or glaucoma.MethodsWe conducted a prospective observational study in the glaucoma department at Quinze-Vingts National Ophthalmology Hospital in Paris. Ninety-five right eyes of 95 patients followed for glaucoma or OHT were included. IOP was measured three times using a Nidek NT-510 non-contact tonometer within a maximum of 5 min before and after VF testing. Sub analyses using logistic regression analysis were performed to evaluate the impact of gender, age, central corneal thickness (CCT), mean deviation (MD) of the VF, VF test duration and filtration surgery on IOP fluctuations.ResultsThere was no significant change in IOP after VF testing, with IOP’s 15.14 ± 4.00 mmHg before and 14.98 ± 3.33 mmHg after the VF (P = 0.4). The average change in IOP was 0.15 ± 1.82 mmHg. Using multivariate analysis, no effect of the VF test on IOP was found (global model fit R2 = 0.12), whether based on duration of the VF test (P = 0.18) or the MD (P = 0.7) after adjustment for age, gender, CCT and history of glaucoma surgery. Similarly, there was no significant difference within different types of glaucoma, including open-angle glaucoma (P = 0.36), chronic angle closure glaucoma (P = 0.85) and OHT (P = 0.42). The subgroup of patients with an IOP elevation ≥2 mmHg had a significantly higher VF test duration (P = 0.002).ConclusionVF testing does not influence IOP as measured with a non-contact tonometer.
Highlights
To evaluate the influence of automated visual field (VF) testing on intraocular pressure (IOP) in patients with ocular hypertension (OHT) or glaucoma
IOP was measured within a maximum of 5 min before and after VF testing by the same Nidek NT-510 non-contact tonometer (Nidek CO, Gamagori, Japan) which have a test-retest variability of 6.4% [19]
The group with an IOP decrease ≥2 mmHg had a mean age of 59 ± 15 years, a mean VF test duration of 9,6 ± 2.9 min, a mean mean deviation (MD) of − 5.8 ± 8.6 dB and a mean central corneal thickness (CCT) of 552 ± 35 μm
Summary
To evaluate the influence of automated visual field (VF) testing on intraocular pressure (IOP) in patients with ocular hypertension (OHT) or glaucoma. Visual field (VF) testing and intraocular pressure (IOP) measurement are essentials for the diagnosis, monitoring and treatment of glaucoma [1, 2]. It has been demonstrated that IOP in healthy and glaucomatous eyes can be influenced by several factors, including accommodation [5,6,7,8,9,10]. Some studies have already investigated these possible IOP changes following VF testing, but with discordant results. Recupero et al [11] concluded that IOP varied significantly and tended to increase immediately after automated visual field examination in 49 patients (94 eyes) with primary open-angle glaucoma (POAG). Ni et al [12] showed similar results in a retrospective study
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