An instrument is pressed against the eye until the retinal blood vessels are observed collapsing. The pressure recorded by the instrument at that time reflects the pressure within those blood vessels in the retina.
It is worth bearing in mind that there are certain disorders of blood circulation in the eye in the cases of which the pressure in the blood vessels is reduced, hence they can be caused to collapse by a lower than normal pressure on the eyeball.
More about Ophthalmology:
This section includes short definitions
of many diseases, disorders, and conditions of the eyes and visual system.
For definitions of other terms in this category, choose from the list to the left (but note that this is not a complete/exhaustive list).
Other related pages include
- A diagram of the eye
- Definitions and descriptions of the parts of the eye
- A concise description of the human retina
- Definitions of parts of the retina
- Diseases and disorders of the human eye and the human visual system
For further information see also our pages of books about ophthalmology.