Eduard Jäger von Jaxtthal
Encyclopedia
Vienna
Vienna is the capital and largest city of the Republic of Austria and one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.723 million , and is by far the largest city in Austria, as well as its cultural, economic, and political centre...
. He was a professor at the University of Vienna
University of Vienna
The University of Vienna is a public university located in Vienna, Austria. It was founded by Duke Rudolph IV in 1365 and is the oldest university in the German-speaking world...
, and was son to oculist Friedrich Jäger von Jaxtthal
Friedrich Jäger von Jaxtthal
Christoph Friedrich Jäger Ritter von Jaxtthal was an Austrian ophthalmologist who was a native of Kirchberg an der Jagst. He studied medicine in Vienna and Landshut, and in 1809 was a physician in the Napoleonic Wars. In 1812 he returned to Vienna, where he received his medical degree at the...
(1784-1871), and grandson to Georg Joseph Beer
Georg Joseph Beer
Georg Joseph Beer was an Austrian ophthalmologist . He is credited with introducing a flap operation for treatment of cataracts , as well as popularizing the instrument used to perform the surgery .-Career:Initially a theology student, in 1786 he earned his medical doctorate in Vienna...
(1763-1821).
Jäger is remembered for his work involving eye operations, and his research of ophthalmic disorders. He was an early practitioner of the ophthalmoscope, and was among the first to use ophthalmoscopy
Ophthalmoscopy
Ophthalmoscopy is a test that allows a health professional to see inside the fundus of the eye and other structures using an ophthalmoscope . It is done as part of an eye examination and may be done as part of a routine physical examination...
to determine the refractive error
Refractive error
A refractive error, or refraction error, is an error in the focusing of light by the eye and a frequent reason for reduced visual acuity.-Classification:...
in the eye
Human eye
The human eye is an organ which reacts to light for several purposes. As a conscious sense organ, the eye allows vision. Rod and cone cells in the retina allow conscious light perception and vision including color differentiation and the perception of depth...
. He is also credited with providing the first description of retinal
Retina
The vertebrate retina is a light-sensitive tissue lining the inner surface of the eye. The optics of the eye create an image of the visual world on the retina, which serves much the same function as the film in a camera. Light striking the retina initiates a cascade of chemical and electrical...
appearances associated with diabetes.
In the 1850s Jäger made improvements to eye chart
Eye chart
An eye chart is a chart used to measure visual acuity. Types of eye charts include the logMAR chart, Snellen chart, Landolt C, and the Lea test.-Procedure:Charts usually display several rows of optotypes , each row in a different size...
test types that were developed by Heinrich Kuechler (1811-1873), and in 1862 Dutch ophthalmologist Hermann Snellen
Hermann Snellen
Herman Snellen was a Dutch ophthalmologist who introduced the Snellen chart to study visual acuity . He took over directorship of the Netherlands Hospital for Eye Patients after Dr...
introduced the popular "Snellen chart
Snellen chart
A Snellen chart is an eye chart used by eye care professionals and others to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Herman Snellen who developed the chart during 1862...
" for testing visual acuity
Visual acuity
Visual acuity is acuteness or clearness of vision, which is dependent on the sharpness of the retinal focus within the eye and the sensitivity of the interpretative faculty of the brain....
.
Selected writings
- Beiträge zur Pathologie des Auges (Contributions to the PathologyPathologyPathology is the precise study and diagnosis of disease. The word pathology is from Ancient Greek , pathos, "feeling, suffering"; and , -logia, "the study of". Pathologization, to pathologize, refers to the process of defining a condition or behavior as pathological, e.g. pathological gambling....
of the Eye)- Wien: Staatsdruckerei, 1855. - Ergebnisse der Untersuchung des menschlichen Auges mit dem Augenspiegel (Results of the Investigation of the Human Eye with the Ophthalmoscope)- Wien: Staatsdr. 1855.
- Ophthalmoskopischer Hand-Atlas (Ophthalmoscopic Hand Atlas)- Wien, Hofdruckerei 1869.
External links
See also
- Jäger (disambiguation)