Classification of the Arteriosclerotic-Hypertensive Fundus Oculi in Patients Treated With Sympathectomy

The light streak on retinal vessels

“…The theoretical modelling presents the parameters that may influence the intensity of the reflection (I,) from retinal vessels, and it shows the trend of variations of I, as a function of changes in these parameters. We feel that the lower intensities observed (Wilmer et al 1933;Scheie 1953;Gans 1964;Wendland 1966) and measured (Brinchmann-Hansen & Sandvik 1986c) on veins compared to arteries must be explaised by significant differences in one or more of these physical factors. If we suppose that an artery and a vein of the same size in the same eye are viewed at the same nearly perpendicular angle, then, per exclusionem, only the indices of refraction or the roughness of surface, or both must account for the differences observed in the two types of vessels.…”

The light streak on retinal vessels

“…The theoretical modelling presents the parameters that may influence the intensity of the reflection (I,) from retinal vessels, and it shows the trend of variations of I, as a function of changes in these parameters. We feel that the lower intensities observed (Wilmer et al 1933;Scheie 1953;Gans 1964;Wendland 1966) and measured (Brinchmann-Hansen & Sandvik 1986c) on veins compared to arteries must be explaised by significant differences in one or more of these physical factors. If we suppose that an artery and a vein of the same size in the same eye are viewed at the same nearly perpendicular angle, then, per exclusionem, only the indices of refraction or the roughness of surface, or both must account for the differences observed in the two types of vessels.…”

The Ophthalmoscopical Appearance of the Fundus Oculi in Elderly Persons with Arterio-Sclerosis and Normal Blood Pressures

“…THE FUNDUS OCULI AND ARTERIO-SCLEROSIS Gans (1944) The classification of retinal changes in hypertension which is most used at the present time is that suggested by Wagener and Keith (1937) …”

Hypertensive Vascular Changes in the Eye

“…If the narrowing of the artery depends on a contraction only, the reflex diminishes, on the contrary, in breadth and intensity. Gans (1944) thus asserts that, by means of the appearance of the arterial reflex, it is possible to differentiate between a narrowing caused by contraction and one caused by thickening of the wall. Both kinds can occur in essential hypertension.…”

The light streak on retinal vessels

“…The theoretical modelling presents the parameters that may influence the intensity of the reflection (I,) from retinal vessels, and it shows the trend of variations of I, as a function of changes in these parameters. We feel that the lower intensities observed (Wilmer et al 1933;Scheie 1953;Gans 1964;Wendland 1966) and measured (Brinchmann-Hansen & Sandvik 1986c) on veins compared to arteries must be explaised by significant differences in one or more of these physical factors. If we suppose that an artery and a vein of the same size in the same eye are viewed at the same nearly perpendicular angle, then, per exclusionem, only the indices of refraction or the roughness of surface, or both must account for the differences observed in the two types of vessels.…”

The Ophthalmoscopical Appearance of the Fundus Oculi in Elderly Persons with Arterio-Sclerosis and Normal Blood Pressures

“…THE FUNDUS OCULI AND ARTERIO-SCLEROSIS Gans (1944) The classification of retinal changes in hypertension which is most used at the present time is that suggested by Wagener and Keith (1937) …”

Hypertensive Vascular Changes in the Eye

“…If the narrowing of the artery depends on a contraction only, the reflex diminishes, on the contrary, in breadth and intensity. Gans (1944) thus asserts that, by means of the appearance of the arterial reflex, it is possible to differentiate between a narrowing caused by contraction and one caused by thickening of the wall. Both kinds can occur in essential hypertension.…”

The light streak on retinal vessels

“…The theoretical modelling presents the parameters that may influence the intensity of the reflection (I,) from retinal vessels, and it shows the trend of variations of I, as a function of changes in these parameters. We feel that the lower intensities observed (Wilmer et al 1933;Scheie 1953;Gans 1964;Wendland 1966) and measured (Brinchmann-Hansen & Sandvik 1986c) on veins compared to arteries must be explaised by significant differences in one or more of these physical factors. If we suppose that an artery and a vein of the same size in the same eye are viewed at the same nearly perpendicular angle, then, per exclusionem, only the indices of refraction or the roughness of surface, or both must account for the differences observed in the two types of vessels.…”

The Ophthalmoscopical Appearance of the Fundus Oculi in Elderly Persons with Arterio-Sclerosis and Normal Blood Pressures

“…THE FUNDUS OCULI AND ARTERIO-SCLEROSIS Gans (1944) The classification of retinal changes in hypertension which is most used at the present time is that suggested by Wagener and Keith (1937) …”

Hypertensive Vascular Changes in the Eye

“…If the narrowing of the artery depends on a contraction only, the reflex diminishes, on the contrary, in breadth and intensity. Gans (1944) thus asserts that, by means of the appearance of the arterial reflex, it is possible to differentiate between a narrowing caused by contraction and one caused by thickening of the wall. Both kinds can occur in essential hypertension.…”