Comparison of iCARE Tonometer with Pulsair and Tonopen in domiciliary work

1 February 2005
Volume 06, Issue 1

The iCARE is a rebound tonometer that does not require the use of an anaesthetic.

Introduction 

Traditionally, intraocular pressure (IOP) has been measured by applanation of the cornea, using a topical anaesthetic, or by non-contact tonometry (NCT), using a puff of air on to the cornea. 

Recently a new type of contact tonometer has been made available: the iCARE is a rebound tonometer that does not require the use of an anaesthetic. Rebound or dynamic tonometry is based on making a moving object collide with the eye, and the motion parameters of the object are monitored following contact. 

Measuring the IOP in a domiciliary environment can be difficult; it was therefore decided to compare this new instrument with the two tonometers most commonly used by domiciliary companies – the Tonopen and the Pulsair. These instruments are used since they allow IOP measurements to be obtained in an objective manner, as does the iCARE. Instruments such as the Perkins, which require a subjective assessment, are less common in domiciliary practice.

Sign in to continue

Forgotten password?
Register

Not already a member of The College?

Start enjoying the benefits of College membership today. Take a look at what the College can offer you and view our membership categories and rates.

Related further reading

This guidance has been developed by The Royal College of Ophthalmologists (RCOphth) and the College of Optometrists (CoO) in response to the pandemic and may be subject to change.

The clinical figures that count.

Heart attacks transiently increase in number when the clocks go forward. Diabetic retinopathy and glaucoma can interfere with the body’s sleep-wake cycles. Becky McCall examines the relationship between the eye and sleep.