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Glossary old book

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Carl Zeiss Meditec AG is one of the world’s leading medical technology companies. Become acquainted with our profile. 



This glossary covers about 40 terms worth to know. Browse through the alphabet and become acquainted with common abbriviations and termini of medical solutions by Carl Zeiss Meditec.  

The AANS (American Association of Neurological Surgeons) has more than 8,000 members worldwide. The industry exhibition held during the AANS's annual meeting is one of the biggest and most influential in the field of neurosurgery.

Abbreviation for American Academy of Ophthalmology - one of the world’s largest ophthalmology exhibitions held in the USA.

An aneurysm is a permanent, localized, balloon-like bulge in an artery. It develops due to an inherent or acquired change in the wall of the affected artery. Tearing or bursting of an aneurysm can lead to life-threatening internal bleeding.

Abbreviation for Age-related Macular Degeneration - Retinal disease of the area of maximum visual acuity (macula) which leads to the loss of central vision.
Most common cause of age-related blindness in industrialized countries.

Abbreviation for American Society of Cataract and Refractive Surgery - Equivalent of .

A visual defect that results from a change to the curvature of the cornea.

Abbreviation for Center for Application & Research in India.

Deterioration of vision through opacity of the lens.
Most common cause of blindness worldwide; typical disease among the elderly.

The CNS (Congress of Neurological Surgeons in the USA) has more than 8,000 members including neurosurgeons, medical students and other medical professionals. The industry exhibition held during the annual meeting is one of the most important in the field of neurosurgery.

Diabetic retinopathy
The risk of visual impairment or even loss of sight due to diabetes is very high. The longer and the higher the concentration of sugar in the blood, the more frequently tiny blood vessels (micro-vessels) in the body are damaged in the entire body, including the tiny vessels in the retina. The result is called diabetic retinopathy.

Abbreviation for Europe, Middle East and Africa - Used to describe the economic region comprising western and eastern Europe, the Middle East and Africa.

Ear, nose and throat surgery (Abbreviation: "ENT surgery")
Also: Otolaryngology
Medical field concerned with the recognition and surgical treatment of diseases, injuries, malformations and malfunctions in the entire head and neck area.

Abbreviation for European Society of Cataract and Refractive Surgery. Equivalent of .

IOL – Intraocular lens
Synthetic lens to replace the natural lens of the eye, used in cataract surgery.

Intraoperative fluorescence (Abbreviation: IOF)
The intraoperative fluorescence is a visualization technique that visualizes information that would otherwise remain invisible or very difficult to detect.

Most of us are familiar with this effect when certain materials seem to glow in black light in discos.
In medicine it is used to visualize blood in vessels or a tumor in surrounding tissue. Depending on the fluorescent agent and light used, the structures appear to light up in a different color. This provides surgeons with additional information that helps them make targeted decisions during the procedure.

ZEISS is one of the pioneers in this field and offers a broad range of products integrated into surgical microscopes. The BLUE 400 fluorescence module, for example, helps surgeons to distinguish tumor from healthy tissue. INFRARED 800 and FLOW 800 permit fast and reliable interpretation of the blood flow. YELLOW 560 enables the establishment of new fluorescence applications.

IORT – Intraoperative Radiotherapy
During Intraoperative Radiotherapy in surgery the exposed target volume (tumor / tumor bed) is subjected to an uniform irradiation.

Intraoperative radiotherapy makes it possible to apply a single high dose to tumors or a tumor bed to improve local tumor control.

By direct irradiation of the surgically exposed target volume during the irradiation the healthy tissue is protected.

Kyphoplasty is a minimally invasive technique for the treatment of vertebral fractures.
Two balloons are inserted in the fractured vertebra via small cannulas with a diameter of approx. 4 mm. By filling the balloon with a contrast agent, the fractured vertebra is straightened. This is then fixated by injecting bone cement into the resulting cavity. The cement hardens in a few minutes and therefore stabilizes the fractured vertebra.

The lenticle in refractive surgery is a tissue layer of the cornea (corneal lens) curved on both sides that is created with a femtosecond laser and is subsequently removed surgically. Its shape determines the change of refractive power following the operation.

Medical field concerned with the detection and surgical treatment of diseases, injuries and malformations of the central nervous system (brain, spinal cord, peripheral nerves).

ONH assessment
Changes in appearance and measurements of the optic nerve head (ONH, also called optic disc – a round or oval area in the back of the eye where nerve fibers come together to form the optic nerve) assessed to facilitate glaucoma diagnosis and management. The ONH has an outer disc boundary and an inner cup definition. These boundaries can be assessed qualitatively with fundus images and OCT. Also proprietary software for OCT systems can measure the disc area, the "rim" thickness between the disc and cup boundaries and various ratios of the disc area to cup area. Change in these measurements over time can also be analyzed.

OPMI® is an abbreviation for surgical (operation) microscope. OPMI® is a registered trademark of ZEISS.

OVD (Abbreviation for Ophthalmic Viscoelastic Devices)
Consumables used in cataract surgery. OVDs are transparent, viscoelastic solutions (most commonly made from sodium hyaluronate) that maintain the shape of the eye and protect the internal tissues during intraocular surgery.

Ultrasound is used to shatter the opaque natural lens of the eye and simultaneously remove it from the eye by the application of suction.

Plastic and reconstructive surgery
Medial discipline in which body shape or body function is restored or enhanced using surgical procedures.

International campaign “VISION 2020 – The Right to Sight” initiated by the World Health Organization (WHO) and the IAPB (International Agency for the Prevention of Blindness). The goal of the campaign is to eliminate avoidable blindness by 2020, e.g. by cost-effective measures for disease control and by investment in training and infrastructure development. Within the framework of VISION 2020, ZEISS promotes the setup of ophthalmic training centers.

(Partial) removal of the vitreous humor of the eye during an operation, e.g. in order to treat the retina.

Abbreviation for World Ophthalmology Congress which meets once a year.


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