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What is Glaucoma?

Glaucoma is a group of eye diseases that cause progressive damage of the optic nerve at the point where it leaves the eye to carry visual information to the brain.

If left untreated, most types of glaucoma progress (without warning nor obvious symptoms to the patient) towards gradually worsening visual damage and may lead to blindness. Once incurred, visual damage is mostly irreversible, and this has led to glaucoma being described as the “silent blinding disease” or the “sneak thief of sight”.

Glaucoma Facts - Worldwide

  • 78 million have glaucoma
  • 111.8 million are predicted to have glaucoma by 2040
  • Glaucoma is the most common cause of irreversible blindness
  • In many cases, glaucoma may be asymptomatic, meaning it shows no symptoms; half of those living with glaucoma are unaware that they are affected
  • Every 1 in 200 people aged 40 have glaucoma, which rises to 1 in 8 by aged 80.
  • The earlier the diagnosis, the less damage will be done and the more vision will be saved!


(Source: WGA, https://wga.one/wga/what-is-glaucoma/)

Patients don’t see their scotoma!

The normal driver’s view

Common textbook illustration of a glaucomatous field defect

The patient’s view: no apparent scotoma

“Glaucoma is one of the leading causes of irreversible blindness, but with early treatment, the damage may get limited and sight may be saved.”

Fabian Lerner
President World Glaucoma Association
(2020 – 2021)

“By promoting regular testing, we also want glaucoma patients to get their relatives involved, as the chances of them getting glaucoma are 10 times higher than someone with no glaucoma history in their close family environment.”

Ivan Goldberg
Council Member World Glaucoma Association


That’s how OCULUS supports Eye Specialists

OCULUS has a number of methods and options to offer when it comes to glaucoma screening, follow-up and patient management:
Tonometry, perimetry, tomography, pachymetry and, new to the range, the Biomechanical Glaucoma Factor for early detection of normal tension glaucoma as well as biomechanically corrected intraocular pressure. All this is available from OCULUS.

The Glaucoma Experts from OCULUS

Download the PDF and get an overview about the devices and software, website links are implemented.

Download PDF

OCULUS SOLUTIONS for detecting Glaucoma

Download the extended brochure of OCULUS Glaucoma Experts with implemented statistics (Source WGA) and patient education.

Download PDF

Please note: The new GONIO ready® is not yet featured in the Glaucoma Experts’ brochure. Please visit oculussurgical.com/gonio-ready.html to learn more.


Air pulse tonometry is used for contactless measurement of intraocular pressure, which, in combination with pachymetry, is an important diagnostic indicator of glaucoma.
The Corvis® ST from OCULUS can do even more however: its non-contact tonometer with an inbuilt high-speed camera shows the response of the cornea to an air pulse in a short film sequence of more than 4 300 images per second.

Biomechanical corrected IOP (bIOP)
The biomechanical corrected IOP (bIOP) takes corneal thickness, age and the biomechanical properties of the cornea into consideration. This enables an accurate IOP estimation even in case of altered biomechanical properties1.

1Hun Lee et al.: Changes in biomechanically corrected intraocular pressure and dynamic corneal response parameters before and after transepithelial photorefractive keratectomy and femtosecond laser–assisted laser in situ keratomileusis: Journal of Cataract & Refractive Surgery 43 (12), 2017: 1495 -1503.

Biomechanical Glaucoma Factor (BGF): Screening for normal tension glaucoma
Intraocular pressure measurement will not indicate any elevated risk for glaucoma and also the optic nerve head might appear relatively normal. In Europe up to 30 percent of primary open angle glaucoma patients have a normal intraocular pressure, in Asia the incidence of NTG is even higher.
The Biomechanical Glaucoma Factor (BGF)2 was developed for the Corvis® ST and is an independent risk factor for normal tension glaucoma and can be used to screen for NTG patients.

2 Pillunat KR, Herber R, Spoerl E, Erb C, Pillunat LE.: A new biomechanical glaucoma factor to discriminate normal eyes from normal pressure glaucoma eyes. Acta Ophthalmol. 2019 Nov; 97(7)


Monitoring of retinal function has long been used in the diagnosis and follow-up of glaucoma. OCULUS has the right perimeter for every use: from spherical bowl perimeters covering a 90° visual field suited for all possible indications to compact devices covering the central visual field.

Even with an increasing number of various advanced imaging methods, perimetry remains the only method at hand for direct and comprehensive measurement of the visual function. Visual field tests continue to represent an important tool in early detection, staging and progression control of glaucoma. In the hand of an experienced practitioner, a perimeter is more than just a device for final confirmation of suspicions raised by previous diagnostic procedures; it can provide by itself precise and reliable information necessary for a diagnosis.

OCULUS offers a range of perimeters for every use: from 30° to 90° eccentricity, static and kinetic perimetry, portable or mounted on a purpose-designed table. All four perimeters from OCULUS are united by one and the same unique software. They are intuitive to operate and powered by extremely fast and reliable strategies – good for you, good for your patients.

Optimized for monitoring functional
impairment in glaucoma

Easyfield® C
Full-fledged compact perimeter,
up to 30° eccentricity

Centerfield® 2
Compact projection perimeter,
up to 70° eccentricity

Twinfield® 2
Versatile projection perimeter,
up to 90° eccentricity


The Pentacam® provides automatic evaluation of the anterior eye segment, from the anterior corneal surface to the posterior lens surface using a rotating Scheimpflug camera. The non-contact measuring process takes only 2 seconds and performs up to 50 single captures. In total, up to 138 000 true elevation points are detected and processed to a 3D model of the anterior eye segment.

The Gold Standard for anterior
eye segment tomography

Pentacam® HR
High-resolution Scheimpflug images
of the anterior eye segment

Pentacam® AXL
Anterior segment tomography
and optical biometry

Pentacam® AXL Wave
Anterior segment tomography,
optical biometry, objective
refraction, retroillumination
and wavefront aberrometry

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The availability of products and features may vary by country, and OCULUS reserves the right to change product specifications and design. Please contact your local distributor for current product availability in your country.

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