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Retinal scan. A retinal scan is a biometric technique that uses unique patterns on a person's retina blood vessels. It is not to be confused with other ocular-based technologies: iris recognition, commonly called an "iris scan", and eye vein verification that uses scleral veins.
A subconjunctival hemorrhage can often occur without any obvious cause or harm to the eye. A strong enough sneeze or cough can cause a blood vessel in the eye to burst. Hyphema is a result of blunt or penetrating trauma to the orbit that increases intraocular pressure, causing tears in the vessels of the ciliary body and iris.
Specialty. Ophthalmology. Hyphema is the medical condition of bleeding in the anterior chamber of the eye between the iris and the cornea. [ 1] People usually first notice a loss or decrease in vision. [ 1] The eye may also appear to have a reddish tinge, or it may appear as a small pool of blood at the bottom of the iris in the cornea.
Click here to see Best Things to Eat and Drink When Taking a Red-Eye "The most important part of surviving a red-eye is planning ahead," says Brooke Alpert of B Nutritious. If you put as much ...
Strongly modulated blood flow pulse in central and branch arteries can result from hypertension. Microangiography by laser Doppler imaging [3] may reveal altered hemodynamics non-invasively. Mild signs of hypertensive retinopathy can be seen quite frequently in normal people (3–14% of adult individuals aged ≥40 years), even without ...
high blood pressure. air pollution. brain injury. physical inactivity. depression. social isolation. hearing loss. lower levels of education. The Commission’s new report added high cholesterol ...
A bedbug. Two butterflies of the genus Erebia sucking fresh blood from a sock. Hematophagy (sometimes spelled haematophagy or hematophagia) is the practice by certain animals of feeding on blood (from the Greek words αἷμα haima "blood" and φαγεῖν phagein "to eat"). Since blood is a fluid tissue rich in nutritious proteins and lipids ...
Blood gas test. A blood gas test or blood gas analysis tests blood to measure blood gas tension values, it also measures blood pH, and the level and base excess of bicarbonate. The source of the blood is reflected in the name of each test; arterial blood gases come from arteries, venous blood gases come from veins and capillary blood gases come ...