Marlette is a city in Sanilac County in the U.S. state of Michigan. The population was 1,875 at the 2010 census. The city is located within Marlette Township, but is politically autonomous. Marlette is known as The Heart of the Thumb due to its location in Michigan's thumb.
Measuring Eye Pressure. Eye pressure is measured in millimeters of mercury (mm Hg). Normal eye pressure ranges from 12-22 mm Hg, and eye pressure of greater than 22 mm Hg is considered higher than normal.When the IOP is higher than normal but the person does not show signs of glaucoma, this is referred to as ocular hypertension.High eye pressure alone does not cause glaucoma. However, it is a significant risk factor.Individuals diagnosed with high eye pressure should have regular comprehensive eye examinations by an eyecare professional to check for signs of the onset of glaucoma.igh eye pressure alone does not cause glaucoma. However, it is a significant risk factor. Individuals diagnosed with high eye pressure should have regular comprehensive eye examinations by an eyecare professional to check for signs of the onset of glaucoma.
The causes for elevated eye pressures are only partially known. In some individuals, a specific cause can be identified. High eye pressure is always related to some increased resistance or obstruction of the normal outflow of fluid inside the eye. Inside the eye, fluid is constantly being manufactured and has to drain from inside the eye. The pressure will only elevate if the drainage system in the eye is somehow not functioning properly. With injury or trauma, for example, the drainage system can be blocked in the eye, hopefully only temporarily. However, in most individuals with elevated eye pressure and glaucoma, the drainage system appears normal but is not functioning properly.