Henson Perimeters

Detect and monitor glaucoma with the unique and innovative Henson range


Professor David Henson – leading the way in glaucoma screening and monitoring3 clear principles

The Henson brand is driven by three clear principles: innovation, improving operator efficiency and ensuring patient usability. These have motivated us since the launch of our first screener in 1986 and continue to do so to this day with the Henson 9000 Perimeter.

30 years of innovation

When Professor Henson invented the CFS 2000 it was the world’s first computerized, multiple-stimulus, supra-threshold perimeter. Its release revolutionized the way in which visual field tests were performed. It produced a standard printout and allowed the electronic storage of results for future recall or transfer to other computers. By introducing the concept of extending tests the CFS 2000 also made life easier for patients, by shortening tests for those who were at low risk of glaucoma, thereby speeding up practice workflow, too.

Responding to practitioner needs

Our desire to constantly improve our products is driven both by Professor Henson’s expertise as a respected academic and his close understanding of practitioner needs, first from his time as a practising optometrist and then as a clinical academic at Cardiff University, Manchester University and Manchester Royal Eye Hospital. This has also allowed the Henson range to claim some notable firsts. In 1993 the Henson CFA 4000 became the first perimeter to allow operators to retest and/or add points during a visual field test for improved specificity. In 2009, ZATA was the first threshold test to use prior test data for threshold tests, reducing test times, increasing accuracy and making tests more manageable for patients.

The latest innovation

And now, in 2018, Smart Supra becomes the first supra-threshold test to incorporate both 24-2 and 10-2 test locations in its program to improve sensitivity to small central defects often missed by 24-2 tests¹. Another innovation, the Smart Supra algorithm uses supra-threshold increments based upon probability limits, thus providing pattern and total deviation probability map outputs similar to those seen in threshold tests, but with a combined 24-2 and 10-2 test that can be completed in ~3.5 minutes*. (Performing consecutive 24-2 and 10-2 threshold tests would normally take over 10 minutes.)

Personal and brand recognition

In 2004 Professor Henson was made a Life Fellow of the College of Optometrists and in 2018 was given the Lifetime Achievement Award by the Association of Optometrists. He also held the position of Honorary Secretary of the International Perimetric Society, of which he has long been a member. Henson has published over 100 academic papers along with two complete texts, Optometric Instrumentation (Butterworth Heinmann) and Visual Fields (Oxford University Press). He has supervised more than 15 PhD students and sits on the Editorial Board of Acta Ophthalmologica and Ophthalmic & Physiological Optics.

Today the Henson 9000 enjoys over 50% market share in the UK Optometry sector

Both Henson models are available for purchase via an international network of distributors.