The effect of inhaled steroids on the intraocular pressure.

BACKGROUND

Steroids are known to play a role in the pathogenesis of glaucoma, but little is known about the effect of inhaled corticosteroids (ICS). The purpose of this study was to investigate whether there is a clinically significant association between inhalational steroids and intraocular pressure (IOP).

METHODS

This was a cross-sectional, case-control study performed at St John's Medical College, Bengaluru, India, from October 2013 to July 2015 of 200 patients using 800 mcg of budesonide or its equivalent dose of ICS and 200 healthy controls not using any form of steroids. Patients using ICS for a period of at least 6 months with no usage of oral or topical steroids within the last 3 months were included as cases. Age- and sex-matched controls were recruited from among the general patient population of the ophthalmological department. IOP and central corneal thickness (CCT) were analyzed. Cases were divided into two subgroups. Group 1 had IOP of <21 mm Hg and cup-to-disc ratio of <0.5. Group 2 had IOP of ≥21 mm Hg or cup-to-disc ratio of ≥0.5 or cup-disc asymmetry ≥0.2. These two subgroups were analyzed to determine whether there was an increased risk of developing ocular hypertension or glaucoma with extended use of ICS.

RESULTS

A total of 400 subjects participated, with 200 in each group. The mean IOP of cases was 15.31 ± 3.27 mm Hg, statistically significantly higher than the mean of 13.39 mm Hg ± 1.95 in controls ( < 0.001). The mean CCT in cases was 522.02 ± 30.47 μm, lower than the mean of 528.73 ± 29.09 μm of the control group ( > 0.001). Of the 200 cases, 11 (5.5%) had ocular hypertension and 2 (1%) had open-angle glaucoma. There was no statistically significant correlation between duration of inhaled steroids usage and increase in IOP ( = 0.62). There was no development of ocular hypertension or glaucoma among the controls.

CONCLUSIONS

Our findings suggest a probable association between ICS and IOP and that it may be advisable to measure baseline IOPs and CCT and to follow patients on ICS at regular intervals.