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Circadian intraocular pressure variation with beta-blockers
S Krag1, H B Andersen, T Sørensen
1Department of Ophthalmology, Arhus University Hospital, Denmark.
Acta Ophthalmologica Scandinavica
|November 7, 1999
Summary
Topical beta-blockers for glaucoma may cause significant nighttime intraocular pressure (IOP) spikes. Conventional daytime measurements might miss critical IOP variations in patients on monotherapy.
Area of Science:
- Ophthalmology
- Pharmacology
Background:
- Glaucoma management often involves topical beta-blockers.
- Intraocular pressure (IOP) monitoring is crucial for glaucoma patients.
Purpose of the Study:
- To investigate circadian intraocular pressure (IOP) variation.
- To assess IOP fluctuations in patients using topical beta-blockers as monotherapy.
Main Methods:
- Circadian IOP curves were measured in 25 patients (47 eyes) on topical beta-blockers.
- IOP was recorded four times daily and twice nightly using a non-contact tonometer.
Main Results:
- Nighttime IOP was significantly higher than daytime IOP.
- 34% of patients showed >5 mmHg IOP increase at night; 15% showed 10-18 mmHg increase.
- Median circadian IOP variation was 7 mmHg (4 mmHg during daytime).
Conclusions:
- Topical beta-blockers as monotherapy may lead to greater IOP variations than detected by standard daytime measurements.
- Circadian IOP monitoring may be necessary for a comprehensive assessment in these patients.